Question | Answer |
Number of groups on periodic table | 18 |
Number of periods on the periodic table | 7 |
Group 2/ 2A elements | Alkali Earth Metals |
Can be hammered without breaking | malleable |
Group 18/ 8A elements | Noble gases |
first periodic table arranged elements by ____________ | increasing atomic mass |
Shatters when hammered | brittle |
number of protons | atomic number |
current periodic table arranges elements by _________ | increasing atomic number |
change in number of electrons | ion |
change in number of protons | a different element |
change in number of neutrons | isotope |
can be formed into wires | ductile |
aka poor conductor of heat and/or electricity | insulator |
has properties of both metals and nonmetals | metalloid |
these make up the majority of the periodic table | metals |
subatomic particle with a negative charge | electron |
subatomic particle with a neutral charge | neutron |
subatomic particle with a positive charge | proton |
the 2 subatomic particles found in the nucleus; the mass | protons & neutrons |
the 2 subatomic particles in equal numbers if atom is neutral | protons & electrons |
subatomic particle responsible for the volume & chemical properties | electrons |
Group 1/1A elements | Alkali Metals |
Group 17/7A elements | Halogens |
overall charge of atom | zero (neutral) |
charge of the nucleus only | positive |
another name for metalloids | semi-conductors |
ability to reflect light | shiny |
does not reflect light | dull |
ability to attract electrons from another atom | electronegativity |
most electronegative element in the representative groups | F |
element with largest atomic size in the representative groups | Fr |
Parts of periodic table that are NOT representative | Group 18 , d block , f block |
elements that are liquids at room temperature | Hg , Br |
block that Helium belongs to | s |
The top row of the f block is in this period | 6th |
The bottom row of the f block is in this period | 7th |
The most electronegative group/family | Halogens |
electrons closest to the nucleus of an atom | core |
electrons furthest away from the nucleus of an atom | valence |