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Definition
| an unstable nucleus that is radioactive. |
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Term
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Definition
| one of two or more different forms of an element in the same phase. |
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Term
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Definition
| A homogeneous mixture of a metal with another element, usually another metal. |
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Term
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Definition
| vertical column on the periodic table. |
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Term
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Definition
| Verticle column on the periodic table. |
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Term
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Definition
| compounds with the same molecular formulas but different structural arrangement. |
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Term
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Definition
| Atom of an element that has a specific amount of protons and nuetrons |
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