MHT CET 2026 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2026

What is the observed electronic configuration of Cu ?

(A)
(B)Correct
(C)
(D)

Answer: (B)

Solution

Copper (Z = 29) does not follow the expected configuration. One 4s electron shifts to the 3d subshell because a completely filled arrangement has extra stability (symmetry and

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Question ID VK-099386