Question

Transition metals generally form coloured ions. why?

Answer 1

due to d-d transition as half either empty or partially filled orbitals

Answer 2

Answer:

• Most of the complexes of transition metals are coloured.
• This is because of the absorption of radiation from visible light region to promote an electron from one of the d−orbitals to another.
• In the presence of ligands, the d-orbitals split up into two sets of orbitals having different energies.
• Therefore, the transition of electrons can take place from one set toanother.
• The energy required for these transitions is quite small and falls in the visible region of radiation.
• The ions of transition metals absorb the radiation of a particular wavelength and the rest is reflected, imparting colour to the solution.