Which of the following has maximum number of unpaired $$d-electrons$$

Question

Infinity Learn · Accepted Answer

Zn $$=$$ $$Z=$$ $$30$$ , Electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s2$$ $$3d$$ $$10$$ , number of unpaired $$d-electrons$$ $$=$$ $$0Fe$$ $$=$$ Z $$=$$ $$26$$ , Electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s2$$ $$3d$$ $$6$$ Fe $$+2$$ electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s0$$ $$3d$$ $$6$$,number of unpaired $$d-electrons$$ $$=$$ $$4Ni$$ $$=$$ Z $$=$$ $$28$$ , Electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s2$$ $$3d$$ $$8$$ Ni $$+3$$ $$=$$ Electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s0$$ $$3d7$$,number of unpaired $$d-electrons$$ $$=$$ $$3cu+$$ $$=Z=$$ $$29$$  , Electronic configuration $$-$$ $$($$ Ar $$)$$ $$4s0$$ $$3d10$$,number of unpaired $$d-electrons$$ $$=$$ $$0Fe$$ $$+2$$ contains  maximum number of unpaired $$d-electrons$$.

Which of the following has maximum number of unpaired d-electrons

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