Term
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Definition
| The electrons that are in the highest energy level of an atom and that are involved in chemical reactions. |
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Term
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Definition
| The force that holds atoms together |
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Term
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Definition
| One or two letters that are used to identify a specific element |
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Term
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Definition
| The overall mass of an atom; equal to the # of protons added to the # of neutrons |
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Term
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Definition
| The # of protons in an atom |
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Term
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Definition
| Elements in the same horizontal row of the periodic table. |
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Term
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Definition
| Elements in the same vertical column of the periodic table; also called a family |
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Term
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Definition
| An element belonging to Group 18 of the periodic. Very stable and unreactive nonmetal gases. |
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Term
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Definition
| An element belonging to Group 17 of the periodic table. Extremely reactive nonmetals |
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Term
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Definition
| An element belonging to Group 1 of the periodic table. Extremely reactive metals |
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