Question

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

• A. $Zn^+$
• B. $Fe^{2+}$
• C. $Ni^{3+}$
• D. $Cu^{+}$

Answer 1

Answer: (B)

$Fe ^{2+}$ has maximum unpaired d electrons of $4 . Zn ^{2+}$ has no unpaired electrons.. $Ni ^{2+}$ has E2$unpaired electron and$Cu ^{2+}$ has two electrons.