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  4. The effective atomic number of cobalt in the complex [Co(NH3)6]3+ is

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Q. The effective atomic number of cobalt in the complex $[Co(NH_{3})_{6}]^{3+}$ is

Coordination Compounds

Solution:

EAN = at. no. of central atom - oxidation state $+2 \times$ (no. of ligands) $= 27 - 3 + 2 \times 6 = 36.$