Q. Formation of coloured ions by transition metals signifies
A) Absorption of light from UV range
B) Emission of light
C) Presence of unpaired electrons in $s$ and $p$ orbitals
D) Complimentary colours to the absorbed light
Explanation
(d)
Transition metals due to the presence of partially, filled $d$-orbitals, are coloured.
The unpaired electron present in partially filled $d$-orbital is excited to the higher energy $d$-orbital by absorbing energy from visible light and thus exhibits the complementary colour. Due to which the transition metal ions appear coloured.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.