Question

Why halogens are colored?

Answer 1

Halogens

• Fluorine, Chlorine, Bromine, Iodine, and Astatine are members of Group $17$.
• These are collectively known as halogens.

Color for halogens

• This is caused by the visible region's light absorption, which causes outer electrons to be excited to a higher energy level.
• They exhibit various colours because they absorb different amounts of radiation.
• ${\mathrm{F}}_2$ has yellow, ${\mathrm{Cl}}_2$ greenish yellow,${\mathrm{Br}}_2$ red and ${\mathrm{I}}_2$violet colour.