Question

Alkaline earth metal which do not impart colour to flame

Answer 1

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When these electrons return to their ground states, they emit extra energy in form of radiations which fall in the visible region thereby imparting a characteristic colour to the flame. Ba and Mg do not impart any colour to the fame i.e. they do not give flame test. This is due to their very small size.

Answer 2

Answer:

Mg and Ba do not impact colour to flame