Regents Chemistry Test Preparation Practice

    Nuclear Chemistry

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    Base your answers to questions 12 on the information below and on your knowledge of chemistry.

    A nuclear reaction is represented by the equation below.

    31H → 32He + 0-1e

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    Base your answers to questions 13 on the information below and on your knowledge of chemistry.

    The isotope Rn-222 is produced by the decay of uranium in Earth’s crust. Some of this isotope leaks into basements of homes in areas where the ground is more porous. An atom of Rn-222 decays to an atom of Pb-206 through a series of steps as shown on the graph below.

    periodic-table, identification-of-element fig: chem82017-exam_g23.png

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    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    Synthetic radioisotopes may be made by bombarding other nuclides with neutrons. The equations below represent a sequence of reactions converting stable iron–58 to cobalt–60, which is used in medical treatments.

    periodic-table, identification-of-element fig: chem12023-exam_g34.png

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    Base your answers to questions 15 on the information below.

    Nuclear fission has been used to produce electricity. However, nuclear fusion for electricity production is still under development. The notations of some nuclides used in nuclear reactions are shown in the table below.

    nuclear-chemistry, nuclear-reactions fig: chem62012-exam_g26.png

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