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Chapter 5 Vocab

TermDefinition
periodic table an arrangement of elements in columns, based on a set of properties that repeat from row to row
period each row in the periodic table of elements
group each column on the periodic table of elements
periodic law the pattern of repeating properties displayed by elements in the periodic table
atomic mass unit one twelfth the mass on a carbon 12 atom
metals elements that are good conductors of electric current and heat
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 electric current and heat
metalloids elements with properties that fall between those of metals and nonmetals
valence electronens an electron that is in the highest occupied energy level
alkali metals metals that have a single valence electron and are extremely reactive
alkaline earth metals metals that have 2 valence electrons
halogens elements in group 7A
noble gases elements in group 8A
Created by: michael.doyle
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