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12 Cards in this Set
- Front
- Back
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atom
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smallest particles of an element
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atomic number
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the number of protons in a atoms nucleus
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electron
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a negative charge particle that moves in an orbital out side an atom
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energy level
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electrons that are found in paths around an atoms nucleus energy level
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proton
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posterity charge in an atoms nucleus
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nucleus
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the control of a cell
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family/ group
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a vertical column in the periodic table
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chemical symbol
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one or two letters initial
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mass number
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The total number of protons and neutrons in the nucleus of an atom
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neutron
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An elementary particle without an electrical charge
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period
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In the Periodic Table, any of the seven horizontal rows that contain elements arranged in order of increasing atomic
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periodic table
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a table of the elements, arranged in order of increasing atomic number, based on the periodic law. Elements having similar chemical properties and electronic structures appear in vertical columns (groups)
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