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9 Cards in this Set
- Front
- Back
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atom
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smallest particle of an elements ;building block of matter.
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atomic number
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the number of protons in an atoms nucleus.
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electrons
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a negativley charged particle the moves in an orbit shelloutside an atoms nucleus.
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energy level
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electrons are found in paths around an atoms nucleus,energy level (shell)
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proton
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a positively charge in particle in an atom nucleus
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nucleus
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a control center of a cell.
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family/group
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a verticle column in the periodic table that contains smaller elements qualities.
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chemical symbol
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one or two letter inital that repersents the name of an element.
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mass number
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total number of protons and neutrons in a nucleus
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