Question

why transition metals generally form colour compounds
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Answer 1

Answer:

When visible light falls on a transition metal compound or ion, the unpaired electrons present in the lower energe d-orbital get promoted to high energy d-orbitals, called d-d transition, due to the absorption of visible light. ... Therefore, transmitted light shows some colour complementary to the absorbed colour.

Explanation:

Answer 2

• When light falls on the transition element compounds electrons excite and electrons absorb energy and excite.
• When these electrons de-excite they release visible light wavelength.