Question

d -block elements form complexes because they have:

• A. vacant orbitals
• B. small sizes
• C. higher nuclear charge
• D. all of the above

Answer 1

The correct option is D all of the above

Transition metals has incompletely filled d orbital. They have vacant orbitals to accept coordination bond. Complex compounbs are those in which the metal ion bind a number of anions or neutral molecules giving complex species with characteristics properties.

The transition metals form a large no. of complex compounds.

This is due to the comparatively smaller size of the metal ions,their high ionic charges and the availability of d orbitals for bond formation.