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11 Cards in this Set
- Front
- Back
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An average value based on the relative abundance of the element's isotopes.
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atomic mass
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a member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons
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isotope
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the number of nucleons (protons & neutrons) in the atomic nucleus. Used to identify isotopes.
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mass number
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an electrically neutral subatomic particle of the atomic nucleus.
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neutron
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any subatomic particle found in the atomic nucleus. Another namefor either a proton or neutron.
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nucleon
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a positively charged subatomic particle of the atomic nucleus.
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proton
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a count of the number of protons in the atomic nucleus.
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atomic number
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an extrememly small, negatively charged subatomic particle found outside the atomic nucleus.
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electron
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the dense, positively charged center of every atom.
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atomic nucleus
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a law stating that matter is neither created or destroyed in a chemical reaction.
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law of mass conservation
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a law stating that elements combine in definite mass ratios to form compounds.
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law of definite proportions.
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