Question

The EAN of nickel in $Ni(CO{)}_4$ is:

• A. $38$
• B. $36$
• C. $28$
• D. $54$

Answer 1

Answer: (B)

Effective atomic no. (EAN) = at. no. of central atom - oxidation state $+2\times$ (no. of ligands) $=28-0+2\times 4=36.$