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Question

The order in which the atomic radius increases is as follows


A
Li>Be>B
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B
Li<Be<B
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C
Li>B<Be
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D
Li<B>Be
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Solution

The correct option is A Li>Be>B

The atomic & ionic radii of group 13 elements are smaller than the corresponding elements of group 1 and 2 in the same period. This is due to increase in effective nuclear charge & electrons are pulled inwards resulting in a decrease in atomic size.


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