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S8P1.f
Recongnize that there are more than 100 elements& some have similar properties
| Term | Definition |
|---|---|
| periodic table | a chart that organizes all the information about all the elements known according to their properties |
| 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 |
| valence electrons | an electron that is found in the outermost shell of an atom and that determines the chemical properties |
| reactivity | describes how likely an element is to form bonds with another elements |
| metalloid | elements that have properties of both metals and nonmetals |
| inert | unable to chemically react under normal circumstances |