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Periodic Table Vocab
Question | Answer |
---|---|
Group | vertical columns on Periodic Table |
Period | horizontal rows on Periodic Table |
Principal Energy Level | "shell" of electrons |
Valence shell | outermost layer of electrons; identified by period number |
Valence electrons | electrons in outermost shell; bonding electrons |
Octet rule | Valence shell can hold a maximum of eight electrons |
Periodic Law | elements have a repeating (periodic) pattern of characteristics |
Mendeleev | Organized first periodic table |
Modern periodic table | organized by atomic number |
Alkali Metals | group 1/1A metals |
Alkaline Earth Metals | group 2/2A metals |
Transition metals | "B group"; characterized by brightly colored ions and multiple oxidation states |
Halogens | group 17/7A; only group to have all three states of matter |
Noble Gases | group 18/0; nonreactive gases; full valence shell |