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S8P1.f
recognize that there more than 100 elements and some have similar propertices
| Term | Definition |
|---|---|
| perodic table | a chart that organizes information about all of the know elements according to their propertices |
| period | in chemistry,a horizontal row of element in the periodic table |
| group | a vertical column of elements in the periodic;elements according to their properties |
| valence electrons | an electron that is found in the outermost shell of an atom that determines the atom's chemical propertices |
| reactivity | describes how likely an element is to form bonds with other elements |
| metalloid | element that have properties of both metal and non metals |
| inert | unable to react chemically under normal circumstance |