`Z_(eff)` for 4s electron in `_(30)Zn` I s:

Calculate the value of Z_("eff") for 3d electron of ._(21)Sc .

the effective nuclear cvhange (Z_("eff")) takes into account the interelectronic repulsisons in mutielectrons atoms Slaer's rules help us in evaluting z_("eff") fopr various species Apply Slter's Rules to answer the following questions : Z_("eff") for 3d electrons of Zn =x Z_("eff") for 3d electrons of Zn^(2+)=y Z_("eff") for 4s electrons of Zn=z Chose the correct opptions (S) :

The Z_(eff) for 3d electron of Cr 4s electron of Cr 3d electron of Cr^(3+) 3s electron of Cr^(3+) are in the order respectively