Which of the following options does not represent ground state electronic configuration of an atom?

(i) 1s2 2s2 2p6 3s2 3p6 3d8 4s2

(ii) 1s2 2s2 2p6 3s2 3p6 3d9 4s2

(iii) 1s2 2s2 2p6 3s2 3p6 3d10 4s1

(iv) 1s2 2s2 2p6 3s2 3p6 3d5 4s1

Answers (1)

The correct answer is the option (b) as the correct configuration would be

1s2 2s2 2p6 3s2 3p6 3d10 4s1

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