Identify the ligands and central metal ion in `[Co(NH_3)_2(en)_2]^(3+)` ,Calculate the oxidation number and coordination number of metal ion.

Explanation

In `[Co(NH_(3))_(2)(en)_(2)]^(3+)`, ligands are ammonia and ethylene diamine.
Oxidation number of cobalt `= +3`.
Central metal ion is `Co^(3+)` and it is surrounded by two monodentate ligands `NH_(3)` and two bidentate ligands ethylene diamine. Thus coordination number of `Co^(3+)` is 6.