Why lithium flame give red color?

Answer 1

Lithium flame gives a lilac colour when ignited.

Answer 2

The red color in a lithium flame is due to the excitation of lithium atoms. When lithium is heated in a flame, the electrons in the lithium atoms are excited to higher energy levels. As they return to their ground state, they emit light in the red part of the spectrum, resulting in the characteristic red color of a lithium flame.

Answer 3

The color of the flame test depends on the specific emission lines of an chemical element.