Question

The species Ar, K. and Ca2+ contain the same number of electrons. In which order do their radii
increase ?
1) Ca2+ <K+ < Ar
2) K+ < Ar < Ca2+
3) Ar <K+ < Ca
4) Ca2+ < Ar <K+
​

Answer 1

Answer:

the corecct option is 1st one

Explanation:

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Answer 2

Answer:

the third one is the correct answer

Explanation:

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