Regents Chemistry Test Preparation Practice

    Atomic Concepts

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

    A student compares some models of the atom. These models are listed in the table below in order of development from top to bottom.

    historic-models fig: chem62014-exam_g11.png

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

    The diagrams below represent four different atomic nuclei.

    identification-of-element fig: chem62017-exam_g21.png

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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.

    nucleus fig: chem12016-exam_g8.png

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