Regents Chemistry Test Preparation Practice

    Atomic Structore

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    Base your answers to questions 14 on the information below.

    The element boron, a trace element in Earth’s crust, is found in foods produced from plants. Boron has only two naturally occurring stable isotopes, boron-10 and boron-11.

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    Base your answers to questions 15 on the information below and on your knowledge of chemistry.

    Elements with an atomic number greater than 92 can be artificially produced in nuclear reactions by bombarding a naturally occurring nuclide with a different nuclide. One of these elements is roentgenium, Rg. The equation below represents a nuclear reaction that produces Rg-272.

    atomic-concepts, atomic-structore, nucleus, periodic-table, identification-of-element fig: chem12016-exam_g8.png

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