Chemistry, asked by Vikram3257, 1 year ago

what is the quantum number of 21st electron of Cr.

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Answered by honeysingh96

The electronic configuration of chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5. The last electron comes in 3d orbital. Quantum numbers for the last electron in Cr : n = 3 ,l= 2, m= +2 , s= +1\2

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