The number of unidentate ligands in the comples ion is called

Options

A. oxidation number
B. primary valency
C. coordination number
D. EAN

Answer

C

Explanation

Coordination number or ligancy is the total number of monodentate or unidentate ligands surrounding the central atom in the coordination sphere or in the complex ion.
e.g. `[Co(NH_(3))_(6)]^(3+)` - coordination number = 6.