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p.t. terms vocab
ch. 5 terms
Question | Answer |
---|---|
A row in the periodic table. | Period |
A column of elements in a periodic table. | Group |
The pattern of repeating properties displayed by elements in the periodic table. | Periodic Law |
One twelfth the mass of a carbon-12 atom. | Atomic Mass Unit |
Elements that are good conductors of heat and electric current. | Metals |
Elements that form a bridge between elements on the left and right sides of the period table. | Transition Metals |
Elements that are poor conductors of heat and electric currents. | Nonmetals |
Elements with properties that fall between those of metal and nonmetals. | Metalloids |
An electron that is in the highest occupied energy level of an atom. | Valence Electron |
These metals are extreamly reactive and have a single valence electron. | Alkali Metals |
These metals have two valence electrons and are harder then Alkali metals. | Alkaline Earth Metals |
Highly reactive nonmetals, with seven valence electrons. | Halogens |
They are colorless, oderless, and extreamly unreactive, with eight valence electrons. | Noble Gases |