Question

Why all alkali metals and their salts impart characteristic colour to an oxidising flame

Answer 1

Alkali metals impart characteristic colours to the flame due to low ionisation enthalpy, when an alkali metal or its salt is heated in a flame, the valence electrons are excited to higher energy level

Answer 2

HLO MATE HERE IS UR ANSWER.

⭐. Alkali metals and their salts impart characteristic colours to oxidising flame.

❤. REASON ❤

⭐. The heat from the flamw excites the outer most electrons to a higher energy level.

⭐. When excited electeons come back to the ground state , they emit the absorbed energy in the form of light in visible region.

✨. Lithium ---------- crimson red.

✨. Sodium ----------- yellow.

✨. Potassium -------Lilac or pale violet.

✨ Rubidium ----------Red violet.

✨. Caesium ----------Blue violet.