Arrange the following elements in increasing order of their atomic radii.
$C l, A t, B r, I$

C l < B r < I < A t

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C l < I < B r < A t

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C l < A t < B r < I

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B r < C l < I < A t

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Solution

The correct option is A $C l < B r < I < A t$
In a group as we move from top to bottom atomic size increase because of addition of new outer most shell.Th above mentioned elements in the question are the elements present in the group in the sequence of $C l, B r, I, A t$ .Hence order for radii would be $C l < B r < I < A t$ .

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Similar questions

(I^{-}, C l^{-}, B r^{-})

Question 36
Arrange the following elements in increasing order of their atomic radii.

(a) Li, Be, F, N
(b) Cl, At, Br, I

For the following

(a) $I^{-}$ (b) $C l^{-}$ (c) $B r^{-}$
The increasing order of nucleophilicity would be

I^{-}, B r^{-}, C l^{-}, F^{-}

C - C l, C - B r, C - F, C - I

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