How would you chracterize the flame test?

Answer 1

you need to be more specific!
The flame test is a test of physical properties.
When a atom has energy added into it, the electrons move from a lower energy level to a highewr energy level. They are unstable in this position and return to lower energy levels. In the process they release energy, some in the form of visible light that we see as the color of the flame.

Answer 2

Certain metals produce certain coloured flame.
Eg potassium - lilac; copper - green; sodium - brick-red...