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7 Cards in this Set
- Front
- Back
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Proton |
A subatomic particle that has a + charge and is found in the nucleus of the atom |
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Atomic mass unit |
A unit of mass that describes the mass of an atom or molecule |
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Neutron |
A subatomic particle that has NO charge and is found in the nucleus of an atom |
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Atomic Number |
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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Isotope |
An atom that has the same number of protons (or the same atomic number) as other atoms of the same element but has a different number of neutrons (and thus a different atomic mass) |
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mass number |
The sum of the number of protons and neutrons in the nucleus of an atom |
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Atomic mass |
The mass of an atom expressed in atomic mass units. (amu) |
