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Cailynne
Chapter 5 Vocabulary
Term | Definition |
---|---|
period | a row in a periodic table of elements |
group | each column of elements of the periodic table |
periodic law | the pattern of repeating properties displayed by elements in the periodic table |
atomic mass unit | one twelve the mass of a carbon-12 atom |
metals | elements that are good conductors of heat and electric current |
transition metals | elements that form a bridge between elements on the left and right sides of the periodic table |
nonmetals | elements that are poor conductors of heat and electric current |
metalliods | elements with properties that fall between those of metals and nonmetals |
valence electron | an electron that is in its highest occupied energy level of an atom |
alkali metals | the elements in group 1A of the periodic table, not including hydrogen |
alkaline earth metals | the elements in 2A of the periodic table |
halogens | the elements in group 7A of the periodic table |
noble gases | the elements in 8A of the periodic table |
periodic table | arrangements of elements in columns based on a set of properties that repeat row to row |