Questions
The increasing order of atomic radii of the following group 13 elements is__?
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By Expert Faculty of Sri Chaitanya
a
Al
b
Ga
c
Al
d
Al
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Correct option is B
The atomic radii of this family follow a irregular order due to d orbital contraction and f orbital contraction. The size of Ga is decreased due to poor shielding by the d orbital electrons and the value turns out to be less than Al.
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