Physical Science: Ch. 5 - The Periodic Table Vocabulary
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14 terms
Terms | Definitions |
|---|---|
 AMU | 1/12 the mass of a carbon-12 atom |
| metalloids | elements with properties that fall between metals and nonmetals |
| period | each row in the period table of elements |
| group | each column on the periodic table of elements |
| nonmetals | poor conductors of electric current or heat |
| alkaline earth metals | group 2a; 2 valence electrons |
| transition metals | form a bridge between the left and right sides of the periodic table of elements |
| alkali metals | group 1a; 1 valence electron; highly reactive |
| metals | good conductors of electric current or heat |
| periodic table | arrangement of elements in columns based on a set of properties that repeat from row to row |
| valence electron | electron in the highest occupied energy level of an atom |
| periodic law | pattern of repeating properties that appear on the periodic table |
| halogens | group 7a; 7 valence electrons |
| noble gases | group 8a; 8 valence electrons with the exception of helium |
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