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10 Cards in this Set
- Front
- Back
PROTON
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A protons is a positively charged subatomic particle that is found in the nucleus of an atom.
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Electron
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An electron is a negatively charged subatomic particle that is found in the space outside the nucleus.
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Neutron
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A neutron is a neutral subatomic particle that is found in the nucleus of an atom.
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Atomic Number
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The atomic number of an element equals the number of protons in an atom of that element
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Mass Number
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The mass number of an atom is the sum of the protons and neutrons in the nucleus of that atom.
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Isotopes
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Isotopes are atoms of the same 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 an atom can have.
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Electron cloud
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A visual model of that 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 element; 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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