Among $R b, S r, C s, and B a,$ which has the highest atomic radii.

S r

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R b

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B a

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C s

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Solution

The correct option is D $C s$
The atomic radii increases down the group and decreases across a period. Thus, for the given options $C s$ has the highest atomic radii.

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R b, S r, C s, and B a,

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which of the following is the increasing order of atomic radii of Na, Rb, Cs, k elements?

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