Question

$\left[PdC{l}_2\right(PM{e}_3{)}_2]$ is a diamagnetic complex of $Pd\left(II\right)$. How many unpaired electrons are present in analogous complex of $Ni\left(II\right)$?

• A. Zero
• B. $1$
• C. $2$
• D. $3$

Answer 1

Answer: (C)

$2$

Nickel (atomic number 28) has outer electronic configuration $3d^8,4s^2$
$N{i}^{2+}$ ion has outer electronic configuration $3d^8,4s^0$
It undergoes $s{p}^3$ hybridization.
It contains two unpaired electrons and is paramagnetic.