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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