In the formation of complex entity, the central metal atom/ion acts as

Define central metal atom/ion.

In complex compounds the central metal atom can act as

In complex compounds the metal atom or ion acts as a

Explain the terms Central metal atom/ion.

In which of the following complex ion, the central metal ion is in a state of sp^(3)d^(2) hybridisation ?

In which of the following complex ion, the central metal ions is in a state of sp^(3)d^(2) hybridization ?