Question

(i) 1s^ 2 2s^ 2 2p 3s^ 2 3p6 3d4 4s^ 2 (ii) 1s^ 2 2s^ 2 2p63s^ 2 3p^ 6 3d^ 5 4s^ 1 Which among these is the correct electronic configuration? Give reason.​

Answer 1

Answer:

ii) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵ it is the correct electronic configuration and is of Chromium(Cr). Here the half filled d-orbital is providing more stability to the atom than the full filled s-orbital. Thus electrons filled up like so.

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