Which amongst the following has smallest size?

N a

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A l

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N a^{+}

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A l^{3 +}

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Solution

The correct option is D $A l^{3 +}$
The ion which has maximum positive charge on it has the minimum size as after losing the electrons an atom becomes positive charge which is smaller in size than the actual size of atom.

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N a^{+}

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A l^{3 +}

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N a^{+}, M g^{2 +}

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Which of the following is the correct sequence for atomic radii

A l^{3 +}, N a^{+}, C a^{2 +}

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