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10 Cards in this Set
- Front
- Back
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Proton
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a subatomic particle with the symbol p or p+ and a positive electric charge of 1 elementary charge.
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Electron
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A negatively charged subatomic particle that is found in the space outside the nucleus of an atom
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Neutron
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a neural subatomic particle that is found in the nucleus of an atom
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Atomic number
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is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus.
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Mass number
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the total number of protons and neutrons
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Isotopes
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atoms of a given element that have different numbers of neutrons and different mass numbers
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Energy levels
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the possible energies that electrons in a atom can have
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Electron cloud
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a visual model of the most likely locations for the electrons in an atom
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Period
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A row in a periodic table of elements. the time required for one complete cycle of a periodic motion
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Group
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a column of elements in a periodic table
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