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8 Cards in this Set

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periodic
recurring at intervals of time: periodic revivals of an interest in handicrafts
periodic law
the law that the properties of the elements are periodic functions of their atomic numbers
period
a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany. a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.
group
any collection or assemblage of persons or things; cluster; aggregation: a group of protesters; a remarkable group of paintings
alkali metals
are a series of elements comprising Group 1
alkaline-earth metals
are metallic elements found in the second group of the periodic table
halogens
Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine
noble gases
The six _______ are found in group 18 of the periodic table