Question

Why does barium give a green flame test?​

Answer 1

Answer:

Certain elements gives off a characteristic colour when heated to high temperature. The heat of the flame excites the metal ions, causing them to emit visible light.

Explanation:

The emission spectra of barium contains the wavelenght corresponding to green colour, hence barium gives green colour.

Answer 2

Explanation:

The flame colours of the alkaline earth metal salts in the Bunsen burner are as shown: Calcium gives Brick red colour. Strontium gives Crimson colour. Barium gives Apple green colour. The electrons can be easily excited to higher energy levels. This results in characteristic colour during de-excitation of electrons.