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13 Cards in this Set
- Front
- Back
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The average mass of one atom of an element
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atomic mass
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A unit used to measure the mass of particles in atoms
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atomic mass unit (amu)
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The number of protons in the nucleus of an atom
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atomic number
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A tiny, negatively charged, high-energy particle that moves around the nucleus of an atom
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electron
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Elements in the same vertical column of the periodic table
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family
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Elements in the same vertical column of the periodic table
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group
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Small uncharged particles in the nucleus of an atom
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neutrons
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The central core of an atom containing protons and usually neutrons
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nucleus
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Elements in the same horizontal row of the periodic table
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period
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A chart of the elmetns showing the repeating pattern of their properties
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periodic table
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Samll, positively charged particles in the nucleus of an atom
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protons
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The elecrons that are farthest away from the nucleus of an atom and are invloved in chemical reactions
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valence electrons
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A one- or two-letter representation of an element
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chemical symbol
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