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Distinguish between..............
| Term | Definition |
|---|---|
| Periodic tables | a chart that organize information about all of the known elements according to their properties. |
| Period | in Chemistry a horizontal row of elements in the periodic table. |
| Group | a vertical column of element in the periodic table;element in a group share chemical properties. |
| Valence electrons | an electron that is found in the outermost shell of the atom and that determines the atoms chemical properties. |
| Reactivity | describes how likely an element is form bonus with other elements. |
| Metalloid | element that have properties of both metals and nonmetals |
| lnsert | unable to react chemically under normal circumstance. |