How is a complex compound differentiated from its constituents?

In a complex compound ligand acts as

these compounds can be differentiated by :

In complex compounds the metal atom acts as a

How is pinnately compound leaf different from palmately compound leaf?

Haemoglobin, a complex containing iron is a constituent of blood. The oxidation state of iron in the complex is

What are complex compounds ? Give examples.

In complex compounds the metal atom or ion acts as a