MHT CET 2026 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2026

What is the number of unpaired electrons present in ground state of Silicon and Chromium, respectively?

(A)2 and 4
(B)2 and 6Correct
(C)0 and 6
(D)4 and 5

Answer: (B)

Solution

Silicon (Z = 14): . The two 3p electrons occupy separate p orbitals (Hund's rule), so 2 unpaired electrons. Chromium (Z = 24) is an exception: the ground state is (half-filled d and s subshells are extra

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Question ID VK-099056