18. Which of the following electron configurations is correct? a) Ga: [Kr]4s23d104p1 b) Mo: [Kr]5524 Ca:...

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science chemistry

Answer 1

Answer #1

Correct option is D.

A is not correct because instead of [Ar] they have given [Kr] which is used for next period . So A option is wrong .

B don't follow valence electron count .i.e, for Mo valence electron are 6 but here given 7 .

C option calcium don't have filled 3d orbitals .

D option Br have 7 valence electrons and filled 3d orbitals .

Answer 2

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