Question

why alkali metals impart blue colour over the flame​

Answer 1

The energy of the flame is sufficient to excite the electrons to higher energy level. ... Hence, the electrons emit energy and come back to the original levels. This emitted energy falls in the visible region of electromagnetic spectrum. This is why, alkali metals imparts colour to flame

Answer 2

The energy of the flame is sufficient to excite the electrons to higher energy level. ... Hence, the electrons emit energy and come back to the original levels. This emitted energy falls in the visible region of electromagnetic spectrum. This is why, alkali metals imparts colour to flame.

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