Question

Write four quantum numbers
for 23rd electron for Cr

Answer 1

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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