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Which among the following set of element...

Which among the following set of elements contain same number of valence electrons?

A

`""_11^23X , ""_20^40Y`

B

`""_10^20X,""_19^39Y`

C

`""_11^23X,""_19^39Y`

D

`""_18^40X,""_26^40Y`

Text Solution

Verified by Experts

`""_11^23X, ""_19^39Y` have one valence electron as they are sodium and potassium with electronic arrangements 2, 8, 1 and 2, 8, 8, 1, respectively. Hence, correct option is (c).
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