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8 Cards in this Set
- Front
- Back
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Isotope |
Elements with the same number of protons but a different number of neutrons. |
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Ion |
A positively or negatively charged atom or group of atoms. |
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Atomic Number |
Number of protons in the nucleus of an atom. |
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Mass Number |
The number of particles (protons and neutrons) in the nucleus. |
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Relative Isotopic Mass |
The mass of an atom of an isotope compared to 1/12 of the mass of an atom of Carbon-12. |
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Relative Atomic Mass |
Ar, the weighted mean mass of an atom of a element compared to 1/12 of the mass of an atom of carbon-12. |
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Relative Formula Mass |
The weighted mean mass of a formula unit compared with 1/12 of the mass of Carbon-12. |
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Relative Molecular Mass |
Mr, the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of Carbon-12. |
