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Cards In This Set
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Although typically the nucleus is less than one ten-thousandth the size of the atom, it contains what percentage of the mass of the atom?
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99.9
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What force holds the nucleus together?
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Strong (or nuclear)
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The time required for half the atoms of a radioactive nuclide to decay.
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Half-life
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Nucleons.
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Protons and neutrons
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An atom.
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Nuclide
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The difference betweeen the mass of an atom and the sum of the masses of its protons, neutrons, and electrons.
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Mass Defect
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The energy released when a nucleus is formed from nucleons.
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Nuclear Binding Energy
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The most stable nuclei have this ration of neutrons to protons.
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1:1
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Has it been found that the most stable nuclide have an even or odd number of nucleons?
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Even
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A reaction that affects the nucleus of an atom.
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Nuclear Reaction
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A change in the identity of a nucleus as a result of a change in the number of its protons.
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Transmutation
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What did Becquerel do on March 1, 1896 and why was it important?
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He wrapped a photographic plate with a lightproof covering and placed a uranium compound on top of it. Evne though he did not place it in sunlight, the plate was still exposed. This led to the discovery of radioactivity.
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The spontaneous disintegration of a nucleus into a slightly lighter nucleus, accompanied by emission of particles, electromagnetic radiation, or both.
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Radioactive Decay
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All of the nuclides beyond what atomic number on the periodic table are unstable and radioactive.
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83
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The charge of an alpha particle
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+2
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