Question

9. Calculate the effective nuclear charge for (i) a 4s-electron and (ii) a 3d-electron
in iron (Z = 26) having the electronic configuration : (K.U. 2010, H.P.U. 2013)
152 22 26 382 3p 3d 452
Ans. (i) 3.75
(ii) 6.25
m a nni confituration of lanthanum (Z = 57) may be 1s 2s 2p 3s 3p 3d 10​

Answer 1

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