Question

The species Ar, K⁺ and Ca²⁺ contain the same number of electrons. In which order do their radii increase ?
(a) Ca²⁺ < Ar < K⁺
(b) Ca²⁺ < K⁺ < Ar
(c) K⁺ < Ar < Ca²⁺
(d) Ar < K⁺ < Ca²⁺

Answer 1

The correct ans is C

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Answer 2

There radii increases in the order k+<Ar<Ca2+.

Therefore option C is correct.

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