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Q. Effective atomic number of the central metal ion, $Pt$, in the complex $\left[Pt\left(N H_{3}\right)_{6}\right]^{4+}$ is: (The atomic no. of $Pt$ is $78$)

AMUAMU 2012Coordination Compounds

Solution:

EAN of $P t=Z-O N+2 \times L$
$=78-(+4)+2 \times 6=86$