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    Ionic Radii: Example Questions

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    1) Consider the relation shown for the radius of the species indicated. Which choice presents a valid comparison?
    a) Na>Na+
    b) Ca2+>Ca+
    c) Cl>Cl-
    d) S->S2-

    2) The following ions contain the same number of electrons. Rank them in order of decreasing ionic radii.
    Rank from largest to smallest radius. To rank items as equivalent, overlap them.
    Na+, F-, O2-, Al3+, Mg2+, N3-

    3) Which will experience the greater effective nuclear charge, the electrons in the n=3 shell in Ar or n=3 shell in Kr? Which will be closer to the nucleus?

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    Solution Preview

    Ionic Radii

    1) Consider the relation shown for the radius of the species indicated. Which choice presents a valid comparison?

    a)Na>Na+
    b)Ca2+>Ca+
    c)Cl>Cl-
    d)S->S2-

    More negative ions are larger and more positive ions are smaller. ...

    Solution Summary

    Provides steps necessary to determine each of the questions.

    $2.19