Chemical Test for Identication

Alkali Metals

Halogens

When the element is placed in a flame, each one gives off a different color based on the energy emitted giving wavelengths that are in the visible regions from the outer electron jumping to the highest energy level.

🔴 Chlorine – Turns damp litmus red, and then bleaches it.
🔴 Bromine – Bromine also turns damp litmus red and bleaches it but slower. When sodium hydroxide is added, bromine loses its colour.
🔴 Iodine – When starch solution is added, a blue/black colour forms.