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a
Number of d-electrons in Fe+2are equal to number of p-electrons in Cl
b
Orbital angular momentum of 3d orbital is 6 h¯ h¯ = h2π
c
Energy of 2s orbital in H > Li > Na >K
d
Anamolous configuration is observed in Cr, Cu
answer is A.
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Detailed Solution
(1) FeZ=26...... Ar4s23d6Fe+2.....3d6ClZ= 17......1s22s22p63s23p5(2)Orbital angular momentum = ll+1h- l=2 for d -orbital ;thus orbital angular momentum =6 h-(3) Zeff ↑ , energy of the orbital in the same subshell ↓(4) Cr….. Ar4s13d5 Cu …… Ar4s13d10