Effective atomic number of central metal ion in $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$ is

Effective atomic number of central metal ion in $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$is
- Two electrons are contributed by each molecule of ammonia.
- 6 x 2=12 is the contribution from six ammonia molecules.
- The metal is in a +3 oxidation state.
- The unit's total number of electrons is:EAN = (27 - 3) +(6x2)= 36