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10 Cards in this Set
- Front
- Back
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atomic mass |
The average mass of all the isotopes of an element |
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periodic table |
an arrangement of the elements showing the repeating pattern of their properties |
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nucleus |
The central core of an atom which contains protons and neutrons |
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protons |
small, positive charged particles that are found in the nucleus of an atom |
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atomic number |
the number of protons in the nucleus of an atom |
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neutron |
A small particle in the nucleus of the atom, with no electric charge |
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electron |
a tiny negative charged particle that moves around the outside of the nucleus of an atom |
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chemical symbol |
a one- or two-letter representation of an element |
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period |
a horizontal row of elements in the periodic table |
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group |
elements in the same vertical column of the periodic table; also called a family |
