Question

The number of unpaired electrons in $\lbrack Ni(CO)_{4}\rbrack$ is

• A. One
• B. Two
• C. Three
• D. Zero

Answer 1

Answer: (D)

Zero

Answer 2

Ni (Z = 28) : $3d^{8}4s^{2}$

Oxidations state of Ni in $\lbrack Ni(CO)_{4}\rbrack = 0$

NO. of unpaired electrons = 0