The number of neutral molecules or negative groups attached to the central metal atom in a complex ion is called:

Explain homoleptic and heteroleptic complexes.

What is the total number of ligands present in $[CoCl_{2}(NH_{3})_{4}]Cl$?

Consider the following complex: $[Co(CO_3)(NH_3)_5]ClO_4$.
Mark the correct option for the following parameters in order:
Coordination number $-$ Oxidation number $-$ Number of $d$-electrons $-$ Number of unpaired $d$-electrons.

The covalency of $Al$ in $[AlCl(H_2O)_5]^{2+}$ is:

Explain the following term with an example: Hexadentate ligands.