Question

Transition elements form complexes very readily because of:

• A. small cation size
• B. vacant d-orbitals
• C. large nuclear charge
• D. all of the above

Answer 1

The correct option is D all of the above

As transition metals have vacant $d$-orbitals, they exhibt variable valencies and form complexes. Besides, they have smaller size and larger nuclear charge. Hence, they have large charge density which can stablize charged complexes. Therefore, transition metals form complexes very readily.