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Chapter 5 Vocabulary

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
Created by: cailynne.riegler