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S8P1.f
recognize,that,there.are.more than 100 elements and some have similar properties
Term | Definition |
---|---|
periodic table | a chart that organizes info. about all of the known elements according to their properties |
period | in chemistry a horizonal row of elements in the periodic table |
group | a vertical column of elements in the periodic table elements in a group share chemical properties |
valence electrons | an electron that is found in the outermost shell of the atoms and that determins the atoms chemical properties |
mettalloid | elements that have properties of both metals and nonmetals |
inert | unable to react chemically under normal circumstances |
reactivity | describes how likey an element is to form bonds with other elements |