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| Two or more atoms are joined together chemically. Elements can be different or the same. |
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| The center of an atom containing protons and neutrons. |
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Definition
| Particles that have a positive (+) charge. |
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| Particles that do not have a charge and are neutral. |
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| Particles that have a negative charge (-) |
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| This holds the nucleus togehter, keeping the protons and neutrons together. |
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| The number of protons found in an element. |
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| Energy levels where the electrons are found. |
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| The electrons in the outer most shell, determining bonding. |
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Definition
| Does not form a new substance |
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Definition
| An example of a physical change |
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Definition
| An example of a chemical change |
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