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18 September, 11:36

How does the radius of a positive and negative ion compare to a neutral atom?

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  1. 18 September, 11:42
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    A neutral atom contains equal amount of proton and electron.

    A negative ion contains extra electrons hence there is additional outer shell so it is expected that the radius is bigger than that of a neutral atom.

    While a positive ion contains less electron so there is less outer shell so the radius is smaller than that of a neutral atom.

    Arranging the radius in increasing order:

    positive ion, neutral atom, negative ion
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