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10 Cards in this Set
- Front
- Back
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atom |
smallest piece of an element that still represents that element |
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electron
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particle with a negative charge |
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neutron |
a neutral particle that exists in the nucleus of an atom |
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proton |
particle with a positive charge |
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nucleus |
contains most of the atom's mass and has a positive charge; center of the atom; contains protons and neutrons |
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electron cloud |
an area around an atomic nucleus where an electron is most likely to be located |
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atomic number |
the number of protons in the nucleus of an atom |
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isotope |
atoms of the same element that have different numbers of neutrons |
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mass number |
the sum of the number of protons and neutrons in an atom |
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average atomic mass |
the average mass of the element's isotopes, weighted according to the abundance of each isotope |
