Question

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 $78$)

• A. 74
• B. 90
• C. 86
• D. 84

Answer 1

Answer: (C)

86

Answer 2

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