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6 Cards in this Set
- Front
- Back
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The number of protons in the nucleus is called the _ _ or the _ _ _. |
atomic number / proton number Z. |
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The atomic number defines the _ _ of an element. |
chemical identity |
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The total number of protons plus neutrons in the nucleus (the total number of nucleons) is called the _ _ _. It is the _ that are responsible for almost all of the mass of an atom because _ weigh virtually nothing. |
mass number A. nucleons / electrons |
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Atoms with the same number of protons but different numbers of neutrons and different masses are called _. |
isotopes. |
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Different isotopes of the same element react chemically in exactly the same way as they have the _ _ _. |
same electron configuration. |
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Atoms of different isotopes of the same element vary in _ _ because of the different number of neutrons in their nuclei. |
mass number |
