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  4. The EAN of nickel in Ni(CO)4 is:

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Q. The EAN of nickel in $Ni(CO)_{4}$ is:

Coordination Compounds

Solution:

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