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Definition
| The dense, positively charged mass located in the center of an atom |
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| a positively charged subatomic particle that is found in the nucleus of an atom |
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| a negatively charged subatomic particle that is found in the space outside the nucleus of an atom |
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Definition
| A neutral subatomic particle that is found in the nucleus of an atom |
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Definition
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Definition
| A unique number for each element that equals the number of protons in an atom of that element |
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Definition
| The sum of the number of protons and neutrons in the nucleus of an atom |
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| Atoms of a given element that have different numbers of neutrons and different mass numbers. |
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| The possible energies that electrons in an atom can have |
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Definition
| A visual model of the most likely locations fro the electrons in an atom. |
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Definition
| A region of space around the nucleus where an electron is likely to be found. |
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| The arrangement of electrons in the orbitals of an atom |
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Definition
| A state in which all the electrons in an atom have the lowest possible energies |
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