1.

CALCULATE THE EFFECTIVE NUCLEAR2

Answer»

effective charge is Z - e , where Z = 21 ignore the 4s electron as it is ahead of 3d

and e is. 0*0.35 ( for 0 d electrons beside the 1 that we are calculating ) + 1*18 ( other 18 electron at the back)

so, e = 18

and Z-e = 21-18 =3 is the effective nuclear charge..


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