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10 Cards in this Set
- Front
- Back
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how do chemical reactions differ from nuclear reactions?
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Chemical: changes in the electrons and the atom itself doesn't change Nuclear: changes in the nucleus and the substance changes |
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What causes a nucleus of an atom to become unstable?
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When the neutrons out number the protons
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What is a radioisotope? Which elements have them?
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An unstable isotope that has an atomic number of 83 and greater
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How is stability determined?
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by its protons and neutrons that have a 1:1 ratio
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When will an element undergo alpha decay?
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when the atomic # is 83 and greater
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describe gamma radiation and explain why its loss alone has no effect on the mass or the atomic # of an atom.
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gamma radiation are high energy waves with no mass or change which cannot effect the mass number or atomic number nor does it effect the formation of a new substance.
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What is half-life and how is it determined?
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Half life is the time required for the nuclei to become stable. amt remaining= initial amt(1/2) t/T
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How is carbon dating used?
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it is a method used to measure the age of artifacts that were once living.
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what are nucleons?
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*particles occupying the nucleus *consist of positive charged protons and neutrons *made up of quarks and leptons |
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What forces are acting on the nucleus?
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*strong forces- forces of attraction between the nucleons *independent charges *are a short range |
