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9 Cards in this Set
- Front
- Back
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atomic mass
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the mass (in atomic mass units) of an atomic particle of an element
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electron
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an elementary particle with negative charge
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ions
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an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
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isotopes
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any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights
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models
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A systematic description of an object or phenomenon that shares important characteristics with the object or phenomenon
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neutron
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an elementary particle with 0 charge and mass about equal to a proton, enters into the structure of the atomic nucleus
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nucleus
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the positively charged dense center of an atom
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proton
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a stable particle with positive charge equal to the negative charge of an electron
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valence electrons
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an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom
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