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14 Cards in this Set
- Front
- Back
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anode
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an electrode with a positive charge
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cathode
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an electrode with a negative charge
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electron
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a negatively charged particle
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electron cloud
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the area around the nuleus of an atom where electrons travel
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element
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matter made up of only one type of atom
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nuleus
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a tiny space in the center of an atom that has a positive charge and contains almost all of the atom's mass
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neutron
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a particle that has the same mass as a proton, but has no electical charge
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proton
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the positively charged particle that is in the nucleus of every atom
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atomic number
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the number of protons in the nucleus of an atom of an element
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half-life
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the amount of time it takes for half of a sample of the element to decay
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isotopes
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atoms of the same element that have different numbers of neutrons
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mass number
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the number of neutrons plus protons
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radioactive decay
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the release of particles and energy from the nucleus
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transmutation
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the changing of one element into another through radioactive decay
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