What is responsible for the blue colour of the solution of alkali metali in liquid ammonia? Give chemical equation also.

What is responsible for the blue colour of the solution of alkali meta

1.	What is responsible for the blue colour of the solution of alkali metali in liquid ammonia? Give chemical equation also.
Answer» Solution :The Solvated electron, `[e(NH_(3))]^(-)` or ammoniated electron is responsible for bios COLOUR of alkali metal solution in `NH_(3)`. It absorbs light from VISIBLE region and radiates COMPLEMENTARY colour. (in the equation am = amnioniated) `Na^(+) (am) + e^(-) (am) + NH_(2) (I) to NaNH_(2) (am) + (1)/(2) H_(2) (g)`