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Question

Which of the following is the correct decreasing order of atomic radius for following elements?
B, Al, Ga, In


A

B>Al>Ga>In

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B

In>Ga>Al>B

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C

Al>Ga>In>B

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D

In>B>Ga>Al

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Solution

The correct option is B

In>Ga>Al>B


Atomic Radius increases down the group. All the given elements belong to group 13.
Since atomic radius increases down the group, Option B is the correct answer.


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