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chp 12 vocab

periodic describes something that occurs or repeats at regular intervals
periodic law the law that states that the repeating chemical and the physical properies of elements change periodicly with the atomic numbers of the elements number of the element
period horizontal row of elements in the periodic table
group a vertical colume of elements in the periodic table. the elements share chemical properties, also called family
alkali metal 1 of the elements of group of the periodic table. EX sodium potasium and lytheiume
alkaline-earth-metal 1 of the elements of group 2 of the periodic table EX magnesium calcium and radium
halogen 1 of the elements of gropu 17 of the periodic table EX florine iodine. they combine with metals to form salts
noble gas 1 of the elemtns of group 18 of the periodic table EX helium neon argon noble gases unreactive
Created by: wizardgirl1304