# Question #53543

Nov 25, 2017

A flame test uses this principle. For example, when Sodium (in it's elemental form of $N {a}_{2}$ combusts in oxygen, the Na-Na bond is broken and the energy released emits a yellow flame. The Yellow flame is indicative of the energy (in the form of light energy) that is emitted from the bond. Different energies (i.e. flame colours) indicate different elements being combusted.