Which element among those listed has the smallest atomic radius?

G e

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B r

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A s

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K r

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S e

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Solution

The correct option is A $B r$
From moving from left to right, size decreases. Therefore, bromine has the smallest radius. Kr is inert gas and has Van der Waals' radius that is largest.

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Which one of the following group 17 elements has the smallest atomic radius?

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