The number of s-electrons present in an ion with 55 protons in its unipositive state is (A) 8 (B) 12 (C) 9 (D) 10

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Question

The number of s-electrons present in an ion with 55 protons in its unipositive state is

(A) 8
(B) 12
(C) 9
(D) 10

Prashant Kotian · Accepted Answer

Correct answer: D. Cs+1 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 Total number of s-electrons = 10

💡 Solution & Explanation