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8 Cards in this Set
- Front
- Back
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electron
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a subatomic particle that has a negative electric charge
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nucleus
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an atom's central region, which is made up of protons and neutrons
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proton
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a subatomic particle that has a positive charge and that is found in the nucleus of an atom;
the number of protons of the nucleus is the atomic number, which determines the identity of an element |
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neutron
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a subatomic particle that has no charge and that is found in the nucleus of an atom
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atomic number
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the number of protons in the nucleus of an atom;
the atomic number is the same for all atoms of an element |
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mass number
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the sum of the numbers of the protons and neutrons of the nucleus of an atom
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isotope
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an atom that has the same number of protons (atomic number) as other atoms of the same element but has a different number of neutrons (atomic mass)
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subatomic particles
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the smaller parts that make up atoms (electron, proton, and neutron)
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