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chapter 12 vocab and periodic table
Question | Answer |
---|---|
periodic | describes something that occurs or repeats at regular intervals |
periodic law | the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements |
period | in chemistry, a horizontal row of elements in the periodic table |
group | a vertical column of elements in the periodic table; elements in a group share chemical properties |
alkali metal | one of the elements of Group 1 of the periodic table ( lithium, sodium |