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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 information about all of the known elements according to their properties |
| period | in chemistry a horizontal row 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 electrons that is found in the outermost shell of anatom and that dertermines the atoms chemical properties |
| reactivity | describes how likely have properties of both metals and nonmetals |
| inert | unable to react chemically under normal circumstances |
| metalloid | elements that have properties of both metals and non metals |