Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Element Flashcards

Name, #, Mass, Electronegativity, Density, Valency, Radius, melt/boil, describe

H Hydrogen # 1 --- Mass = 1.01 <br> Electroneg. = 2.1 --- Density = 0.0000833 <br> Valency = 1 --- Radius = 0.12 <br> Melt = 14 - Boil = 20 <br> Colourless, odourless, flammable gas <br> Valence = 1
He Helium # 2 --- Mass = 4 <br> Electroneg. = - --- Density = 0.000166 <br> Valency = 0 --- Radius = 0.18 <br> Melt = 1 - Boil = 4 <br> Colourless, odourless, unreactive gas <br> Valence = 2
Li Lithium # 3 --- Mass = 6.94 <br> Electroneg. = 1 --- Density = 0.53 <br> Valency = 1 --- Radius = 0.18 <br> Melt = 454 - Boil = 1615 <br> Shiny, soft, silver-grey, reactive metal <br> Valence = 2, 1
Be Beryllium # 4 --- Mass = 9.01 <br> Electroneg. = 1.5 --- Density = 1.85 <br> Valency = 2 --- Radius = - <br> Melt = 1551 - Boil = 3243 <br> Hard, brittle, steel-grey semi-metal <br> Valence = 2, 2
B Boron # 5 --- Mass = 10.81 <br> Electroneg. = 2 --- Density = 2.34 <br> Valency = 3 --- Radius = - <br> Melt = 2573 - Boil = 2823 <br> Hard, brittle, shiny, black semi-metal <br> Valence = 2, 3
C Carbon (graphite) # 6 --- Mass = 12.01 <br> Electroneg. = 2.5 --- Density = 2.25 <br> Valency = 4 (2) --- Radius = 0.17 <br> Melt = 3925 - Boil = 5100 <br> Dark grey solid <br> Valence = 2, 4
N Nitrogen # 7 --- Mass = 14.01 <br> Electroneg. = 3 --- Density = 0.00116 <br> Valency = 3 (5) --- Radius = 0.155 <br> Melt = 63 - Boil = 77 <br> Colourless, odourless, relatively unreactive gas <br> Valence = 2, 5
O Oxygen # 8 --- Mass = 16 <br> Electroneg. = 3.5 --- Density = 0.00133 <br> Valency = 2 --- Radius = 0.15 <br> Melt = 55 - Boil = 90 <br> Colourless, odourless gas, supports combustion <br> Valence = 2, 6
F Fluorine # 9 --- Mass = 19 <br> Electroneg. = 4 --- Density = 0.00158 <br> Valency = 1 --- Radius = 0.155 <br> Melt = 53 - Boil = 85 <br> Pale yellow, highly reactive gas <br> Valence = 2, 7
Ne Neon # 10 --- Mass = 20.18 <br> Electroneg. = - --- Density = 0.000833 <br> Valency = 0 --- Radius = 0.16 <br> Melt = 25 - Boil = 27 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8
Na Sodium # 11 --- Mass = 22.99 <br> Electroneg. = 0.9 --- Density = 0.97 <br> Valency = 1 --- Radius = 0.23 <br> Melt = 371 - Boil = 1156 <br> Shiny, soft, silver-grey, very reactive metal <br> Valence = 2, 8, 1
Mg Magnesium # 12 --- Mass = 24.31 <br> Electroneg. = 1.2 --- Density = 1.74 <br> Valency = 2 --- Radius = 0.17 <br> Melt = 922 - Boil = 1380 <br> Shiny, silver-grey, reactive metal <br> Valence = 2, 8, 2
Al Aluminium # 13 --- Mass = 26.92 <br> Electroneg. = 1.5 --- Density = 2.7 <br> Valency = 3 --- Radius = - <br> Melt = 933 - Boil = 2740 <br> Shiny, silver-grey metal <br> Valence = 2, 8, 3
Si Silicon # 14 --- Mass = 28.09 <br> Electroneg. = 1.8 --- Density = 2.32 <br> Valency = 4 --- Radius = 0.21 <br> Melt = 1683 - Boil = 2628 <br> Shiny grey semi-metal <br> Valence = 2, 8, 4
P Phosphorus (white) # 15 --- Mass = 30.97 <br> Electroneg. = 2.1 --- Density = 1.82 <br> Valency = 5 (3) --- Radius = 0.185 <br> Melt = 317 - Boil = 553 <br> White powder <br> Valence = 2, 8, 5
S Sulfur (rhombic) # 16 --- Mass = 32.06 <br> Electroneg. = 2.5 --- Density = 2.07 <br> Valency = 2 --- Radius = 0.18 <br> Melt = 386 - Boil = 718 <br> Yellow powder <br> Valence = 2, 8, 6
Cl Chlorine # 17 --- Mass = 35.45 <br> Electroneg. = 3 --- Density = 0.00296 <br> Valency = 1 --- Radius = 0.18 <br> Melt = 172 - Boil = 238 <br> Greenish-yellow, very reactive gas, bleachy smell <br> Valence = 2, 8, 7
Ar Argon # 18 --- Mass = 39.95 <br> Electroneg. = - --- Density = 0.00166 <br> Valency = 0 --- Radius = 0.19 <br> Melt = 84 - Boil = 87 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 8
K Potassium # 19 --- Mass = 39.1 <br> Electroneg. = 0.8 --- Density = 0.86 <br> Valency = 1 --- Radius = 0.28 <br> Melt = 336 - Boil = 1033 <br> Shiny, soft, silver-grey, extremely reactive metal <br> Valence = 2, 8, 8, 1
Ca Calcium # 20 --- Mass = 40.08 <br> Electroneg. = 1 --- Density = 1.54 <br> Valency = 2 --- Radius = - <br> Melt = 1112 - Boil = 1757 <br> Shiny, silver-grey, very reactive metal <br> Valence = 2, 8, 8, 2
Sc Scandium # 21 --- Mass = 44.96 <br> Electroneg. = 1.3 --- Density = 2.99 <br> Valency = 3 --- Radius = - <br> Melt = 1814 - Boil = 3104 <br> Fairly soft, silvery-white metal <br> Valence = 2, 8, 9, 2
Ti Titanium # 22 --- Mass = 47.9 <br> Electroneg. = 1.5 --- Density = 4.5 <br> Valency = variable --- Radius = - <br> Melt = 1933 - Boil = 3560 <br> Shiny, dark-grey metal <br> Valence = 2, 8, 10, 2
V Vanadium # 23 --- Mass = 50.94 <br> Electroneg. = 1.6 --- Density = 5.96 <br> Valency = variable --- Radius = - <br> Melt = 2163 - Boil = 3653 <br> Silvery-white metal <br> Valence = 2, 8, 11, 2
Cr Chromium # 24 --- Mass = 52 <br> Electroneg. = 1.6 --- Density = 7.2 <br> Valency = variable --- Radius = - <br> Melt = 2130 - Boil = 2943 <br> Very hard, blue-white metal <br> Valence = 2, 8, 13, 1
Mn Manganese # 25 --- Mass = 54.94 <br> Electroneg. = 1.5 --- Density = 7.2 <br> Valency = variable --- Radius = - <br> Melt = 1517 - Boil = 2235 <br> Hard, brittle, grey-white metal <br> Valence = 2, 8, 13, 2
Fe Iron # 26 --- Mass = 55.85 <br> Electroneg. = 1.8 --- Density = 7.86 <br> Valency = 3 (2) --- Radius = - <br> Melt = 1808 - Boil = 3023 <br> Silvery, magnetic metal <br> Valence = 2, 8, 14, 2
Co Cobalt # 27 --- Mass = 58.93 <br> Electroneg. = 1.8 --- Density = 8.9 <br> Valency = variable --- Radius = - <br> Melt = 1768 - Boil = 3143 <br> Bluish-grey, magnetic metal <br> Valence = 2, 8, 15, 2
Ni Nickel # 28 --- Mass = 58.71 <br> Electroneg. = 1.8 --- Density = 8.9 <br> Valency = variable --- Radius = 0.16 <br> Melt = 1728 - Boil = 3003 <br> Hard, silvery-white, magnetic metal <br> Valence = 2, 8, 16, 2
Cu Copper # 29 --- Mass = 63.55 <br> Electroneg. = 1.9 --- Density = 8.92 <br> Valency = 2 (1) --- Radius = 0.14 <br> Melt = 1356 - Boil = 2840 <br> Reddish-brown, relatively unreactive metal <br> Valence = 2, 8, 18, 1
Zn Zinc # 30 --- Mass = 65.38 <br> Electroneg. = 1.6 --- Density = 7.14 <br> Valency = 2 --- Radius = 0.14 <br> Melt = 693 - Boil = 1180 <br> Bluish-silver metal <br> Valence = 2, 8, 18, 2
Ga Gallium # 31 --- Mass = 69.74 <br> Electroneg. = 1.6 --- Density = 5.9 <br> Valency = 3 --- Radius = 0.19 <br> Melt = 303 - Boil = 2676 <br> Soft, blue-white metal <br> Valence = 2, 8, 18, 3
Ge Germanium # 32 --- Mass = 72.59 <br> Electroneg. = 1.8 --- Density = 5.35 <br> Valency = 4 (2) --- Radius = - <br> Melt = 1210 - Boil = 3103 <br> Greyish-white, brittle semi-metal <br> Valence = 2, 8, 18, 4
As Arsenic (grey) # 33 --- Mass = 74.92 <br> Electroneg. = 2 --- Density = 5.73 <br> Valency = 3 (5) --- Radius = - <br> Melt = 889 - Boil = 889 <br> Steel-grey, brittle semi-metal <br> Valence = 2, 8, 18, 5
Se Selenium # 34 --- Mass = 78.96 <br> Electroneg. = 2.4 --- Density = 4.81 <br> Valency = 2 (4) --- Radius = 0.19 <br> Melt = 490 - Boil = 958 <br> Soft grey semi-metal <br> Valence = 2, 8, 18, 6
Br Bromine # 35 --- Mass = 79.91 <br> Electroneg. = 2.8 --- Density = 3.12 <br> Valency = 1 --- Radius = 0.19 <br> Melt = 266 - Boil = 332 <br> Reddish-brown reactive liquid, bleachy smell <br> Valence = 2, 8, 18, 7
Kr Krypton # 36 --- Mass = 83.8 <br> Electroneg. = - --- Density = 0.00346 <br> Valency = 0 --- Radius = 0.2 <br> Melt = 116 - Boil = 121 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 8
Rb Rubidium # 37 --- Mass = 85.47 <br> Electroneg. = 0.8 --- Density = 1.53 <br> Valency = 1 --- Radius = - <br> Melt = 312 - Boil = 959 <br> Soft, silvery-white, violently reactive metal <br> Valence = 2, 8, 18, 8, 1
Sr Strontium # 38 --- Mass = 87.62 <br> Electroneg. = 1 --- Density = 2.6 <br> Valency = 2 --- Radius = - <br> Melt = 1042 - Boil = 1657 <br> Soft, silvery, highly reactive metal <br> Valence = 2, 8, 18, 8, 2
Y Yttrium # 39 --- Mass = 88.91 <br> Electroneg. = - --- Density = 4.47 <br> Valency = 3 --- Radius = - <br> Melt = 1795 - Boil = 3611 <br> Silvery, fairly reactive metal <br> Valence = 2, 8, 18, 9, 2
Zr Zirconium # 40 --- Mass = 91.22 <br> Electroneg. = - --- Density = 6.49 <br> Valency = variable --- Radius = - <br> Melt = 2125 - Boil = 4650 <br> Grey-white metal <br> Valence = 2, 8, 18, 10, 2
Nb Niobium # 41 --- Mass = 92.91 <br> Electroneg. = - --- Density = 8.57 <br> Valency = variable --- Radius = - <br> Melt = 2740 - Boil = 5015 <br> Shiny, white, soft metal <br> Valence = 2, 8, 18, 12, 1
Mo Molybdenum # 42 --- Mass = 95.94 <br> Electroneg. = 1.8 --- Density = 10.2 <br> Valency = variable --- Radius = - <br> Melt = 2883 - Boil = 5833 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 13, 1
Tc Technetium # 43 --- Mass = 98.91 <br> Electroneg. = - --- Density = 11.5 <br> Valency = variable --- Radius = - <br> Melt = 2445 - Boil = 5150 <br> Silver-grey metal <br> Valence = 2, 8, 18, 14, 1
Ru Ruthenium # 44 --- Mass = 101.07 <br> Electroneg. = - --- Density = 12.3 <br> Valency = variable --- Radius = - <br> Melt = 2583 - Boil = 4173 <br> Brittle, unreactive, silver-grey metal <br> Valence = 2, 8, 18, 15, 1
Rh Rhodium # 45 --- Mass = 102.91 <br> Electroneg. = - --- Density = 12.4 <br> Valency = variable --- Radius = - <br> Melt = 2239 - Boil = 4000 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 16, 1
Pd Palladium # 46 --- Mass = 106.4 <br> Electroneg. = - --- Density = 12.02 <br> Valency = variable --- Radius = - <br> Melt = 1827 - Boil = 3243 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18
Ag Silver # 47 --- Mass = 107.87 <br> Electroneg. = 1.9 --- Density = 10.5 <br> Valency = 1 --- Radius = 0.16 <br> Melt = 1235 - Boil = 2485 <br> Silvery metal <br> Valence = 2, 8, 18, 18, 1
Cd Cadmium # 48 --- Mass = 112.41 <br> Electroneg. = 1.7 --- Density = 8.64 <br> Valency = 2 --- Radius = 0.17 <br> Melt = 594 - Boil = 1038 <br> Soft, blue-white metal <br> Valence = 2, 8, 18, 18, 2
In Indium # 49 --- Mass = 114.82 <br> Electroneg. = - --- Density = 7.3 <br> Valency = 3 (1) --- Radius = - <br> Melt = 429 - Boil = 2353 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18, 3
Sn Tin (white) # 50 --- Mass = 118.69 <br> Electroneg. = 1.8 --- Density = 7.28 <br> Valency = 4 (2) --- Radius = 0.19 <br> Melt = 505 - Boil = 2543 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18, 4
Sb Antimony # 51 --- Mass = 121.75 <br> Electroneg. = 1.9 --- Density = 6.68 <br> Valency = 3 (5) --- Radius = - <br> Melt = 904 - Boil = 2023 <br> Hard, brittle, silver-white semi-metal <br> Valence = 2, 8, 18, 18, 5
Te Tellurium # 52 --- Mass = 127.6 <br> Electroneg. = 2.1 --- Density = 6 <br> Valency = variable --- Radius = 0.21 <br> Melt = 723 - Boil = 1263 <br> Brittle, silver-white, semi-metal <br> Valence = 2, 8, 18, 18, 6
I Iodine # 53 --- Mass = 126.9 <br> Electroneg. = 2.5 --- Density = 4.93 <br> Valency = 1 --- Radius = 0.195 <br> Melt = 387 - Boil = 457 <br> Shiny, black, non-metallic solid with bleachy smell <br> Valence = 2, 8, 18, 18, 7
Xe Xenon # 54 --- Mass = 131.3 <br> Electroneg. = - --- Density = 0.00546 <br> Valency = 0 --- Radius = 0.22 <br> Melt = 161 - Boil = 166 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 18, 8
Cs Caesium # 55 --- Mass = 132.91 <br> Electroneg. = 0.7 --- Density = 1.88 <br> Valency = 1 --- Radius = - <br> Melt = 302 - Boil = 942 <br> Soft, shiny, gold-coloured, violently reactive metal <br> Valence = 2, 8, 18, 18, 8, 1
Ba Barium # 56 --- Mass = 137.33 <br> Electroneg. = 0.9 --- Density = 3.51 <br> Valency = 2 --- Radius = - <br> Melt = 998 - Boil = 1913 <br> Iron-grey, extremely reactive metal <br> Valence = 2, 8, 18, 18, 8, 2
La Lanthanum # 57 --- Mass = 138.91 <br> Electroneg. = - --- Density = 6.14 <br> Valency = 3 --- Radius = - <br> Melt = 1194 - Boil = 3730 <br> Soft, silver-white, reactive metal <br> Valence = 2, 8, 18, 18, 9, 2
Ce Cerium # 58 --- Mass = 140.12 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Iron-grey, reactive metal <br> Valence = 2, 8, 18, 20, 8, 2
Pr Praseodymium # 59 --- Mass = 140.91 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, fairly soft, reactive metal <br> Valence = 2, 8, 18, 21, 8, 2
Nd Neodymium # 60 --- Mass = 144.24 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, reactive metal <br> Valence = 2, 8, 18, 22, 8, 2
Pm Promethium # 61 --- Mass = 144.91 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery, fairly reactive metal <br> Valence = 2, 8, 18, 23, 8, 2
Sm Samarium # 62 --- Mass = 150.35 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 24, 8, 2
Eu Europium # 63 --- Mass = 151.96 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery-white metal <br> Valence = 2, 8, 18, 25, 8, 2
Gd Gadolinium # 64 --- Mass = 157.25 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery-white metal <br> Valence = 2, 8, 18, 25, 9, 2
Tb Terbium # 65 --- Mass = 158.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silver-grey metal <br> Valence = 2, 8, 18, 27, 8, 2
Dy Dysprosium # 66 --- Mass = 162.5 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery metal <br> Valence = 2, 8, 18, 28, 8, 2
Ho Holmium # 67 --- Mass = 164.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Fairly soft, silvery metal <br> Valence = 2, 8, 18, 29, 8, 2
Er Erbium # 68 --- Mass = 167.26 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silver-grey metal <br> Valence = 2, 8, 18, 30, 8, 2
Tm Thulium # 69 --- Mass = 168.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery metal <br> Valence = 2, 8, 18, 31, 8, 2
Yb Ytterbium # 70 --- Mass = 173.04 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 8, 2
Lu Lutetium # 71 --- Mass = 174.97 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, hard, dense metal <br> Valence = 2, 8, 18, 32, 9, 2
Hf Hafnium # 72 --- Mass = 178.49 <br> Electroneg. = - --- Density = 13.31 <br> Valency = variable --- Radius = - <br> Melt = 2500 - Boil = 4875 <br> Silvery metal <br> Valence = 2, 8, 18, 32, 10, 2
Ta Tantalum # 73 --- Mass = 180.95 <br> Electroneg. = - --- Density = 16.6 <br> Valency = variable --- Radius = - <br> Melt = 3269 - Boil = 5700 <br> Grey metal <br> Valence = 2, 8, 18, 32, 11, 2
W Tungsten # 74 --- Mass = 183.85 <br> Electroneg. = - --- Density = 19.35 <br> Valency = variable --- Radius = - <br> Melt = 3683 - Boil = 5933 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 32, 12, 2
Re Rhenium # 75 --- Mass = 186.21 <br> Electroneg. = - --- Density = 20.53 <br> Valency = variable --- Radius = - <br> Melt = 3453 - Boil = 5900 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 32, 13, 2
Os Osmium # 76 --- Mass = 190.2 <br> Electroneg. = - --- Density = 22.48 <br> Valency = variable --- Radius = - <br> Melt = 2973 - Boil = 5570 <br> Hard, unreactive, blue-white metal <br> Valence = 2, 8, 18, 32, 14, 2
Ir Iridium # 77 --- Mass = 192.22 <br> Electroneg. = - --- Density = 22.42 <br> Valency = variable --- Radius = - <br> Melt = 2683 - Boil = 4403 <br> Extremely hard, unreactive, silvery metal <br> Valence = 2, 8, 18, 32, 15, 2
Pt Platinum # 78 --- Mass = 195.09 <br> Electroneg. = - --- Density = 21.45 <br> Valency = variable --- Radius = - <br> Melt = 2045 - Boil = 4100 <br> Silver-white, unreactive metal <br> Valence = 2, 8, 18, 32, 17, 1
Au Gold # 79 --- Mass = 196.97 <br> Electroneg. = 2.4 --- Density = 18.88 <br> Valency = variable --- Radius = 0.175 <br> Melt = 1337 - Boil = 3353 <br> Soft, unreactive, bright yellow metal <br> Valence = 2, 8, 18, 32, 18, 1
Hg Mercury # 80 --- Mass = 200.59 <br> Electroneg. = 1.9 --- Density = 13.59 <br> Valency = variable --- Radius = 0.17 <br> Melt = 234 - Boil = 630 <br> Dense, silver-white, unreactive liquid metal <br> Valence = 2, 8, 18, 32, 18, 2
Tl Thallium # 81 --- Mass = 204.37 <br> Electroneg. = - --- Density = 11.85 <br> Valency = 3 (1) --- Radius = - <br> Melt = 577 - Boil = 1730 <br> Soft, grey, fairly reactive metal <br> Valence = 2, 8, 18, 32, 18, 3
Pb Lead # 82 --- Mass = 207.19 <br> Electroneg. = 1.8 --- Density = 11.34 <br> Valency = 2 (4) --- Radius = 0.2 <br> Melt = 601 - Boil = 2013 <br> Soft, pale-grey, shiny metal <br> Valence = 2, 8, 18, 32, 18, 4
Bi Bismuth # 83 --- Mass = 208.98 <br> Electroneg. = 1.9 --- Density = 9.8 <br> Valency = 3 (5) --- Radius = 0.2 <br> Melt = 544 - Boil = 1833 <br> Hard, brittle, whitish metal with a reddish tint <br> Valence = 2, 8, 18, 32, 18, 5
Po Polonium # 84 --- Mass = 210 <br> Electroneg. = - --- Density = 9.4 <br> Valency = 2 (4) --- Radius = - <br> Melt = 527 - Boil = 1235 <br> Silver-grey metal <br> Valence = 2, 8, 18, 32, 18, 6
At Astatine # 85 --- Mass = 209.99 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = 575 - Boil = 610 <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 18, 7
Rn Radon # 86 --- Mass = 222.02 <br> Electroneg. = - --- Density = 0.00925 <br> Valency = 0 --- Radius = - <br> Melt = 202 - Boil = 211 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 32, 18, 8
Fr Francium # 87 --- Mass = 223.02 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = 300 - Boil = 950 <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 18, 8, 1
Ra Radium # 88 --- Mass = 226.03 <br> Electroneg. = - --- Density = 5 <br> Valency = 2 --- Radius = - <br> Melt = 973 - Boil = - <br> Silver-white, dense, extremely reactive metal <br> Valence = 2, 8, 18, 32, 18, 8, 2
Ac Actinium # 89 --- Mass = 227.03 <br> Electroneg. = - --- Density = 10.07 <br> Valency = 3 --- Radius = - <br> Melt = 1323 - Boil = 3473 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 32, 18, 9, 2
Th Thorium # 90 --- Mass = 232.04 <br> Electroneg. = - --- Density = 11.7 <br> Valency = - --- Radius = - <br> Melt = 2023 - Boil = 5060 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 32, 18, 10, 2
Pa Protactinium # 91 --- Mass = 231.04 <br> Electroneg. = - --- Density = 15.37 <br> Valency = - --- Radius = - <br> Melt = - - Boil = 4300 <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 20, 9, 2
U Uranium # 92 --- Mass = 238.03 <br> Electroneg. = - --- Density = 19.05 <br> Valency = - --- Radius = - <br> Melt = 1405 - Boil = 4091 <br> Dense, silvery metal <br> Valence = 2, 8, 18, 32, 21, 9, 2
Np Neptunium # 93 --- Mass = 239.05 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 22, 9, 2
Pu Plutonium # 94 --- Mass = 239.05 <br> Electroneg. = - --- Density = 19.84 <br> Valency = - --- Radius = - <br> Melt = 914 - Boil = 3505 <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 24, 8, 2
Am Americium # 95 --- Mass = 243.06 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 25, 8, 2
Cm Curium # 96 --- Mass = 247.07 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 25, 9, 2
Bk Berkelium # 97 --- Mass = 247.07 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 27, 8, 2
Cf Californium # 98 --- Mass = 252.08 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 28, 8, 2
Es Einsteinium # 99 --- Mass = 254.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 29, 8, 2
Fm Fermium # 100 --- Mass = 253.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 30, 8, 2
Md Mendelevium # 101 --- Mass = 257.1 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 31, 8, 2
No Nobelium # 102 --- Mass = 255.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 8, 2
Lr Lawrencium # 103 --- Mass = 257 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 9, 2
Rf Rutherfordium # 104 --- Mass = 260 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 10, 2
Db Dubnium # 105 --- Mass = 262.11 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 11, 2
Sg Seaborgium # 106 --- Mass = 266.12 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Bh Bohrium # 107 --- Mass = 264.12 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Hs Hassium # 108 --- Mass = 269.13 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Mt Meitnerium # 109 --- Mass = 268.13 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Hydrogen H # 1 --- Mass = 1.01 <br> Electroneg. = 2.1 --- Density = 0.0000833 <br> Valency = 1 --- Radius = 0.12 <br> Melt = 14 - Boil = 20 <br> Colourless, odourless, flammable gas <br> Valence = 1
Helium He # 2 --- Mass = 4 <br> Electroneg. = - --- Density = 0.000166 <br> Valency = 0 --- Radius = 0.18 <br> Melt = 1 - Boil = 4 <br> Colourless, odourless, unreactive gas <br> Valence = 2
Lithium Li # 3 --- Mass = 6.94 <br> Electroneg. = 1 --- Density = 0.53 <br> Valency = 1 --- Radius = 0.18 <br> Melt = 454 - Boil = 1615 <br> Shiny, soft, silver-grey, reactive metal <br> Valence = 2, 1
Beryllium Be # 4 --- Mass = 9.01 <br> Electroneg. = 1.5 --- Density = 1.85 <br> Valency = 2 --- Radius = - <br> Melt = 1551 - Boil = 3243 <br> Hard, brittle, steel-grey semi-metal <br> Valence = 2, 2
Boron B # 5 --- Mass = 10.81 <br> Electroneg. = 2 --- Density = 2.34 <br> Valency = 3 --- Radius = - <br> Melt = 2573 - Boil = 2823 <br> Hard, brittle, shiny, black semi-metal <br> Valence = 2, 3
Carbon (graphite) C # 6 --- Mass = 12.01 <br> Electroneg. = 2.5 --- Density = 2.25 <br> Valency = 4 (2) --- Radius = 0.17 <br> Melt = 3925 - Boil = 5100 <br> Dark grey solid <br> Valence = 2, 4
Nitrogen N # 7 --- Mass = 14.01 <br> Electroneg. = 3 --- Density = 0.00116 <br> Valency = 3 (5) --- Radius = 0.155 <br> Melt = 63 - Boil = 77 <br> Colourless, odourless, relatively unreactive gas <br> Valence = 2, 5
Oxygen O # 8 --- Mass = 16 <br> Electroneg. = 3.5 --- Density = 0.00133 <br> Valency = 2 --- Radius = 0.15 <br> Melt = 55 - Boil = 90 <br> Colourless, odourless gas, supports combustion <br> Valence = 2, 6
Fluorine F # 9 --- Mass = 19 <br> Electroneg. = 4 --- Density = 0.00158 <br> Valency = 1 --- Radius = 0.155 <br> Melt = 53 - Boil = 85 <br> Pale yellow, highly reactive gas <br> Valence = 2, 7
Neon Ne # 10 --- Mass = 20.18 <br> Electroneg. = - --- Density = 0.000833 <br> Valency = 0 --- Radius = 0.16 <br> Melt = 25 - Boil = 27 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8
Sodium Na # 11 --- Mass = 22.99 <br> Electroneg. = 0.9 --- Density = 0.97 <br> Valency = 1 --- Radius = 0.23 <br> Melt = 371 - Boil = 1156 <br> Shiny, soft, silver-grey, very reactive metal <br> Valence = 2, 8, 1
Magnesium Mg # 12 --- Mass = 24.31 <br> Electroneg. = 1.2 --- Density = 1.74 <br> Valency = 2 --- Radius = 0.17 <br> Melt = 922 - Boil = 1380 <br> Shiny, silver-grey, reactive metal <br> Valence = 2, 8, 2
Aluminium Al # 13 --- Mass = 26.92 <br> Electroneg. = 1.5 --- Density = 2.7 <br> Valency = 3 --- Radius = - <br> Melt = 933 - Boil = 2740 <br> Shiny, silver-grey metal <br> Valence = 2, 8, 3
Silicon Si # 14 --- Mass = 28.09 <br> Electroneg. = 1.8 --- Density = 2.32 <br> Valency = 4 --- Radius = 0.21 <br> Melt = 1683 - Boil = 2628 <br> Shiny grey semi-metal <br> Valence = 2, 8, 4
Phosphorus (white) P # 15 --- Mass = 30.97 <br> Electroneg. = 2.1 --- Density = 1.82 <br> Valency = 5 (3) --- Radius = 0.185 <br> Melt = 317 - Boil = 553 <br> White powder <br> Valence = 2, 8, 5
Sulfur (rhombic) S # 16 --- Mass = 32.06 <br> Electroneg. = 2.5 --- Density = 2.07 <br> Valency = 2 --- Radius = 0.18 <br> Melt = 386 - Boil = 718 <br> Yellow powder <br> Valence = 2, 8, 6
Chlorine Cl # 17 --- Mass = 35.45 <br> Electroneg. = 3 --- Density = 0.00296 <br> Valency = 1 --- Radius = 0.18 <br> Melt = 172 - Boil = 238 <br> Greenish-yellow, very reactive gas, bleachy smell <br> Valence = 2, 8, 7
Argon Ar # 18 --- Mass = 39.95 <br> Electroneg. = - --- Density = 0.00166 <br> Valency = 0 --- Radius = 0.19 <br> Melt = 84 - Boil = 87 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 8
Potassium K # 19 --- Mass = 39.1 <br> Electroneg. = 0.8 --- Density = 0.86 <br> Valency = 1 --- Radius = 0.28 <br> Melt = 336 - Boil = 1033 <br> Shiny, soft, silver-grey, extremely reactive metal <br> Valence = 2, 8, 8, 1
Calcium Ca # 20 --- Mass = 40.08 <br> Electroneg. = 1 --- Density = 1.54 <br> Valency = 2 --- Radius = - <br> Melt = 1112 - Boil = 1757 <br> Shiny, silver-grey, very reactive metal <br> Valence = 2, 8, 8, 2
Scandium Sc # 21 --- Mass = 44.96 <br> Electroneg. = 1.3 --- Density = 2.99 <br> Valency = 3 --- Radius = - <br> Melt = 1814 - Boil = 3104 <br> Fairly soft, silvery-white metal <br> Valence = 2, 8, 9, 2
Titanium Ti # 22 --- Mass = 47.9 <br> Electroneg. = 1.5 --- Density = 4.5 <br> Valency = variable --- Radius = - <br> Melt = 1933 - Boil = 3560 <br> Shiny, dark-grey metal <br> Valence = 2, 8, 10, 2
Vanadium V # 23 --- Mass = 50.94 <br> Electroneg. = 1.6 --- Density = 5.96 <br> Valency = variable --- Radius = - <br> Melt = 2163 - Boil = 3653 <br> Silvery-white metal <br> Valence = 2, 8, 11, 2
Chromium Cr # 24 --- Mass = 52 <br> Electroneg. = 1.6 --- Density = 7.2 <br> Valency = variable --- Radius = - <br> Melt = 2130 - Boil = 2943 <br> Very hard, blue-white metal <br> Valence = 2, 8, 13, 1
Manganese Mn # 25 --- Mass = 54.94 <br> Electroneg. = 1.5 --- Density = 7.2 <br> Valency = variable --- Radius = - <br> Melt = 1517 - Boil = 2235 <br> Hard, brittle, grey-white metal <br> Valence = 2, 8, 13, 2
Iron Fe # 26 --- Mass = 55.85 <br> Electroneg. = 1.8 --- Density = 7.86 <br> Valency = 3 (2) --- Radius = - <br> Melt = 1808 - Boil = 3023 <br> Silvery, magnetic metal <br> Valence = 2, 8, 14, 2
Cobalt Co # 27 --- Mass = 58.93 <br> Electroneg. = 1.8 --- Density = 8.9 <br> Valency = variable --- Radius = - <br> Melt = 1768 - Boil = 3143 <br> Bluish-grey, magnetic metal <br> Valence = 2, 8, 15, 2
Nickel Ni # 28 --- Mass = 58.71 <br> Electroneg. = 1.8 --- Density = 8.9 <br> Valency = variable --- Radius = 0.16 <br> Melt = 1728 - Boil = 3003 <br> Hard, silvery-white, magnetic metal <br> Valence = 2, 8, 16, 2
Copper Cu # 29 --- Mass = 63.55 <br> Electroneg. = 1.9 --- Density = 8.92 <br> Valency = 2 (1) --- Radius = 0.14 <br> Melt = 1356 - Boil = 2840 <br> Reddish-brown, relatively unreactive metal <br> Valence = 2, 8, 18, 1
Zinc Zn # 30 --- Mass = 65.38 <br> Electroneg. = 1.6 --- Density = 7.14 <br> Valency = 2 --- Radius = 0.14 <br> Melt = 693 - Boil = 1180 <br> Bluish-silver metal <br> Valence = 2, 8, 18, 2
Gallium Ga # 31 --- Mass = 69.74 <br> Electroneg. = 1.6 --- Density = 5.9 <br> Valency = 3 --- Radius = 0.19 <br> Melt = 303 - Boil = 2676 <br> Soft, blue-white metal <br> Valence = 2, 8, 18, 3
Germanium Ge # 32 --- Mass = 72.59 <br> Electroneg. = 1.8 --- Density = 5.35 <br> Valency = 4 (2) --- Radius = - <br> Melt = 1210 - Boil = 3103 <br> Greyish-white, brittle semi-metal <br> Valence = 2, 8, 18, 4
Arsenic (grey) As # 33 --- Mass = 74.92 <br> Electroneg. = 2 --- Density = 5.73 <br> Valency = 3 (5) --- Radius = - <br> Melt = 889 - Boil = 889 <br> Steel-grey, brittle semi-metal <br> Valence = 2, 8, 18, 5
Selenium Se # 34 --- Mass = 78.96 <br> Electroneg. = 2.4 --- Density = 4.81 <br> Valency = 2 (4) --- Radius = 0.19 <br> Melt = 490 - Boil = 958 <br> Soft grey semi-metal <br> Valence = 2, 8, 18, 6
Bromine Br # 35 --- Mass = 79.91 <br> Electroneg. = 2.8 --- Density = 3.12 <br> Valency = 1 --- Radius = 0.19 <br> Melt = 266 - Boil = 332 <br> Reddish-brown reactive liquid, bleachy smell <br> Valence = 2, 8, 18, 7
Krypton Kr # 36 --- Mass = 83.8 <br> Electroneg. = - --- Density = 0.00346 <br> Valency = 0 --- Radius = 0.2 <br> Melt = 116 - Boil = 121 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 8
Rubidium Rb # 37 --- Mass = 85.47 <br> Electroneg. = 0.8 --- Density = 1.53 <br> Valency = 1 --- Radius = - <br> Melt = 312 - Boil = 959 <br> Soft, silvery-white, violently reactive metal <br> Valence = 2, 8, 18, 8, 1
Strontium Sr # 38 --- Mass = 87.62 <br> Electroneg. = 1 --- Density = 2.6 <br> Valency = 2 --- Radius = - <br> Melt = 1042 - Boil = 1657 <br> Soft, silvery, highly reactive metal <br> Valence = 2, 8, 18, 8, 2
Yttrium Y # 39 --- Mass = 88.91 <br> Electroneg. = - --- Density = 4.47 <br> Valency = 3 --- Radius = - <br> Melt = 1795 - Boil = 3611 <br> Silvery, fairly reactive metal <br> Valence = 2, 8, 18, 9, 2
Zirconium Zr # 40 --- Mass = 91.22 <br> Electroneg. = - --- Density = 6.49 <br> Valency = variable --- Radius = - <br> Melt = 2125 - Boil = 4650 <br> Grey-white metal <br> Valence = 2, 8, 18, 10, 2
Niobium Nb # 41 --- Mass = 92.91 <br> Electroneg. = - --- Density = 8.57 <br> Valency = variable --- Radius = - <br> Melt = 2740 - Boil = 5015 <br> Shiny, white, soft metal <br> Valence = 2, 8, 18, 12, 1
Molybdenum Mo # 42 --- Mass = 95.94 <br> Electroneg. = 1.8 --- Density = 10.2 <br> Valency = variable --- Radius = - <br> Melt = 2883 - Boil = 5833 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 13, 1
Technetium Tc # 43 --- Mass = 98.91 <br> Electroneg. = - --- Density = 11.5 <br> Valency = variable --- Radius = - <br> Melt = 2445 - Boil = 5150 <br> Silver-grey metal <br> Valence = 2, 8, 18, 14, 1
Ruthenium Ru # 44 --- Mass = 101.07 <br> Electroneg. = - --- Density = 12.3 <br> Valency = variable --- Radius = - <br> Melt = 2583 - Boil = 4173 <br> Brittle, unreactive, silver-grey metal <br> Valence = 2, 8, 18, 15, 1
Rhodium Rh # 45 --- Mass = 102.91 <br> Electroneg. = - --- Density = 12.4 <br> Valency = variable --- Radius = - <br> Melt = 2239 - Boil = 4000 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 16, 1
Palladium Pd # 46 --- Mass = 106.4 <br> Electroneg. = - --- Density = 12.02 <br> Valency = variable --- Radius = - <br> Melt = 1827 - Boil = 3243 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18
Silver Ag # 47 --- Mass = 107.87 <br> Electroneg. = 1.9 --- Density = 10.5 <br> Valency = 1 --- Radius = 0.16 <br> Melt = 1235 - Boil = 2485 <br> Silvery metal <br> Valence = 2, 8, 18, 18, 1
Cadmium Cd # 48 --- Mass = 112.41 <br> Electroneg. = 1.7 --- Density = 8.64 <br> Valency = 2 --- Radius = 0.17 <br> Melt = 594 - Boil = 1038 <br> Soft, blue-white metal <br> Valence = 2, 8, 18, 18, 2
Indium In # 49 --- Mass = 114.82 <br> Electroneg. = - --- Density = 7.3 <br> Valency = 3 (1) --- Radius = - <br> Melt = 429 - Boil = 2353 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18, 3
Tin (white) Sn # 50 --- Mass = 118.69 <br> Electroneg. = 1.8 --- Density = 7.28 <br> Valency = 4 (2) --- Radius = 0.19 <br> Melt = 505 - Boil = 2543 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 18, 4
Antimony Sb # 51 --- Mass = 121.75 <br> Electroneg. = 1.9 --- Density = 6.68 <br> Valency = 3 (5) --- Radius = - <br> Melt = 904 - Boil = 2023 <br> Hard, brittle, silver-white semi-metal <br> Valence = 2, 8, 18, 18, 5
Tellurium Te # 52 --- Mass = 127.6 <br> Electroneg. = 2.1 --- Density = 6 <br> Valency = variable --- Radius = 0.21 <br> Melt = 723 - Boil = 1263 <br> Brittle, silver-white, semi-metal <br> Valence = 2, 8, 18, 18, 6
Iodine I # 53 --- Mass = 126.9 <br> Electroneg. = 2.5 --- Density = 4.93 <br> Valency = 1 --- Radius = 0.195 <br> Melt = 387 - Boil = 457 <br> Shiny, black, non-metallic solid with bleachy smell <br> Valence = 2, 8, 18, 18, 7
Xenon Xe # 54 --- Mass = 131.3 <br> Electroneg. = - --- Density = 0.00546 <br> Valency = 0 --- Radius = 0.22 <br> Melt = 161 - Boil = 166 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 18, 8
Caesium Cs # 55 --- Mass = 132.91 <br> Electroneg. = 0.7 --- Density = 1.88 <br> Valency = 1 --- Radius = - <br> Melt = 302 - Boil = 942 <br> Soft, shiny, gold-coloured, violently reactive metal <br> Valence = 2, 8, 18, 18, 8, 1
Barium Ba # 56 --- Mass = 137.33 <br> Electroneg. = 0.9 --- Density = 3.51 <br> Valency = 2 --- Radius = - <br> Melt = 998 - Boil = 1913 <br> Iron-grey, extremely reactive metal <br> Valence = 2, 8, 18, 18, 8, 2
Lanthanum La # 57 --- Mass = 138.91 <br> Electroneg. = - --- Density = 6.14 <br> Valency = 3 --- Radius = - <br> Melt = 1194 - Boil = 3730 <br> Soft, silver-white, reactive metal <br> Valence = 2, 8, 18, 18, 9, 2
Cerium Ce # 58 --- Mass = 140.12 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Iron-grey, reactive metal <br> Valence = 2, 8, 18, 20, 8, 2
Praseodymium Pr # 59 --- Mass = 140.91 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, fairly soft, reactive metal <br> Valence = 2, 8, 18, 21, 8, 2
Neodymium Nd # 60 --- Mass = 144.24 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, reactive metal <br> Valence = 2, 8, 18, 22, 8, 2
Promethium Pm # 61 --- Mass = 144.91 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery, fairly reactive metal <br> Valence = 2, 8, 18, 23, 8, 2
Samarium Sm # 62 --- Mass = 150.35 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 24, 8, 2
Europium Eu # 63 --- Mass = 151.96 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery-white metal <br> Valence = 2, 8, 18, 25, 8, 2
Gadolinium Gd # 64 --- Mass = 157.25 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery-white metal <br> Valence = 2, 8, 18, 25, 9, 2
Terbium Tb # 65 --- Mass = 158.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silver-grey metal <br> Valence = 2, 8, 18, 27, 8, 2
Dysprosium Dy # 66 --- Mass = 162.5 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery metal <br> Valence = 2, 8, 18, 28, 8, 2
Holmium Ho # 67 --- Mass = 164.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Fairly soft, silvery metal <br> Valence = 2, 8, 18, 29, 8, 2
Erbium Er # 68 --- Mass = 167.26 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silver-grey metal <br> Valence = 2, 8, 18, 30, 8, 2
Thulium Tm # 69 --- Mass = 168.93 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Soft, silvery metal <br> Valence = 2, 8, 18, 31, 8, 2
Ytterbium Yb # 70 --- Mass = 173.04 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 8, 2
Lutetium Lu # 71 --- Mass = 174.97 <br> Electroneg. = - --- Density = - <br> Valency = 3 --- Radius = - <br> Melt = - - Boil = - <br> Silver-white, hard, dense metal <br> Valence = 2, 8, 18, 32, 9, 2
Hafnium Hf # 72 --- Mass = 178.49 <br> Electroneg. = - --- Density = 13.31 <br> Valency = variable --- Radius = - <br> Melt = 2500 - Boil = 4875 <br> Silvery metal <br> Valence = 2, 8, 18, 32, 10, 2
Tantalum Ta # 73 --- Mass = 180.95 <br> Electroneg. = - --- Density = 16.6 <br> Valency = variable --- Radius = - <br> Melt = 3269 - Boil = 5700 <br> Grey metal <br> Valence = 2, 8, 18, 32, 11, 2
Tungsten W # 74 --- Mass = 183.85 <br> Electroneg. = - --- Density = 19.35 <br> Valency = variable --- Radius = - <br> Melt = 3683 - Boil = 5933 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 32, 12, 2
Rhenium Re # 75 --- Mass = 186.21 <br> Electroneg. = - --- Density = 20.53 <br> Valency = variable --- Radius = - <br> Melt = 3453 - Boil = 5900 <br> Hard, silver-white metal <br> Valence = 2, 8, 18, 32, 13, 2
Osmium Os # 76 --- Mass = 190.2 <br> Electroneg. = - --- Density = 22.48 <br> Valency = variable --- Radius = - <br> Melt = 2973 - Boil = 5570 <br> Hard, unreactive, blue-white metal <br> Valence = 2, 8, 18, 32, 14, 2
Iridium Ir # 77 --- Mass = 192.22 <br> Electroneg. = - --- Density = 22.42 <br> Valency = variable --- Radius = - <br> Melt = 2683 - Boil = 4403 <br> Extremely hard, unreactive, silvery metal <br> Valence = 2, 8, 18, 32, 15, 2
Platinum Pt # 78 --- Mass = 195.09 <br> Electroneg. = - --- Density = 21.45 <br> Valency = variable --- Radius = - <br> Melt = 2045 - Boil = 4100 <br> Silver-white, unreactive metal <br> Valence = 2, 8, 18, 32, 17, 1
Gold Au # 79 --- Mass = 196.97 <br> Electroneg. = 2.4 --- Density = 18.88 <br> Valency = variable --- Radius = 0.175 <br> Melt = 1337 - Boil = 3353 <br> Soft, unreactive, bright yellow metal <br> Valence = 2, 8, 18, 32, 18, 1
Mercury Hg # 80 --- Mass = 200.59 <br> Electroneg. = 1.9 --- Density = 13.59 <br> Valency = variable --- Radius = 0.17 <br> Melt = 234 - Boil = 630 <br> Dense, silver-white, unreactive liquid metal <br> Valence = 2, 8, 18, 32, 18, 2
Thallium Tl # 81 --- Mass = 204.37 <br> Electroneg. = - --- Density = 11.85 <br> Valency = 3 (1) --- Radius = - <br> Melt = 577 - Boil = 1730 <br> Soft, grey, fairly reactive metal <br> Valence = 2, 8, 18, 32, 18, 3
Lead Pb # 82 --- Mass = 207.19 <br> Electroneg. = 1.8 --- Density = 11.34 <br> Valency = 2 (4) --- Radius = 0.2 <br> Melt = 601 - Boil = 2013 <br> Soft, pale-grey, shiny metal <br> Valence = 2, 8, 18, 32, 18, 4
Bismuth Bi # 83 --- Mass = 208.98 <br> Electroneg. = 1.9 --- Density = 9.8 <br> Valency = 3 (5) --- Radius = 0.2 <br> Melt = 544 - Boil = 1833 <br> Hard, brittle, whitish metal with a reddish tint <br> Valence = 2, 8, 18, 32, 18, 5
Polonium Po # 84 --- Mass = 210 <br> Electroneg. = - --- Density = 9.4 <br> Valency = 2 (4) --- Radius = - <br> Melt = 527 - Boil = 1235 <br> Silver-grey metal <br> Valence = 2, 8, 18, 32, 18, 6
Astatine At # 85 --- Mass = 209.99 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = 575 - Boil = 610 <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 18, 7
Radon Rn # 86 --- Mass = 222.02 <br> Electroneg. = - --- Density = 0.00925 <br> Valency = 0 --- Radius = - <br> Melt = 202 - Boil = 211 <br> Colourless, odourless, unreactive gas <br> Valence = 2, 8, 18, 32, 18, 8
Francium Fr # 87 --- Mass = 223.02 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = 300 - Boil = 950 <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 18, 8, 1
Radium Ra # 88 --- Mass = 226.03 <br> Electroneg. = - --- Density = 5 <br> Valency = 2 --- Radius = - <br> Melt = 973 - Boil = - <br> Silver-white, dense, extremely reactive metal <br> Valence = 2, 8, 18, 32, 18, 8, 2
Actinium Ac # 89 --- Mass = 227.03 <br> Electroneg. = - --- Density = 10.07 <br> Valency = 3 --- Radius = - <br> Melt = 1323 - Boil = 3473 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 32, 18, 9, 2
Thorium Th # 90 --- Mass = 232.04 <br> Electroneg. = - --- Density = 11.7 <br> Valency = - --- Radius = - <br> Melt = 2023 - Boil = 5060 <br> Soft, silver-white metal <br> Valence = 2, 8, 18, 32, 18, 10, 2
Protactinium Pa # 91 --- Mass = 231.04 <br> Electroneg. = - --- Density = 15.37 <br> Valency = - --- Radius = - <br> Melt = - - Boil = 4300 <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 20, 9, 2
Uranium U # 92 --- Mass = 238.03 <br> Electroneg. = - --- Density = 19.05 <br> Valency = - --- Radius = - <br> Melt = 1405 - Boil = 4091 <br> Dense, silvery metal <br> Valence = 2, 8, 18, 32, 21, 9, 2
Neptunium Np # 93 --- Mass = 239.05 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 22, 9, 2
Plutonium Pu # 94 --- Mass = 239.05 <br> Electroneg. = - --- Density = 19.84 <br> Valency = - --- Radius = - <br> Melt = 914 - Boil = 3505 <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 24, 8, 2
Americium Am # 95 --- Mass = 243.06 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silver-white metal <br> Valence = 2, 8, 18, 32, 25, 8, 2
Curium Cm # 96 --- Mass = 247.07 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 25, 9, 2
Berkelium Bk # 97 --- Mass = 247.07 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 27, 8, 2
Californium Cf # 98 --- Mass = 252.08 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 28, 8, 2
Einsteinium Es # 99 --- Mass = 254.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Silvery metal <br> Valence = 2, 8, 18, 32, 29, 8, 2
Fermium Fm # 100 --- Mass = 253.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 30, 8, 2
Mendelevium Md # 101 --- Mass = 257.1 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 31, 8, 2
Nobelium No # 102 --- Mass = 255.09 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 8, 2
Lawrencium Lr # 103 --- Mass = 257 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 9, 2
Rutherfordium Rf # 104 --- Mass = 260 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 10, 2
Dubnium Db # 105 --- Mass = 262.11 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = 2, 8, 18, 32, 32, 11, 2
Seaborgium Sg # 106 --- Mass = 266.12 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Bohrium Bh # 107 --- Mass = 264.12 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Hassium Hs # 108 --- Mass = 269.13 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Meitnerium Mt # 109 --- Mass = 268.13 <br> Electroneg. = - --- Density = - <br> Valency = - --- Radius = - <br> Melt = - - Boil = - <br> Not available in visible quantities <br> Valence = -
Created by: gamergirl79
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards