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

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

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) :