Question

Why does each salt have its own distinctive flame test color.

Answer 1

Explanation:

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

Answer 2

because different salts have different electronic configuration hence different electron energy,so they emit different wavelength of light hence different colors