Alkali and alkaline earth metals impart colours when heated over burner. It is due to

Question:Alkali and alkaline earth metals impart colours when heated over burner. It is due to

1.Smaller electronegativity of alkali metals

2.Smaller ionic radius of these metals

3.Excitation of Excitation of electrons from low energy levels to higher energy levels

4.Excitation of electrons from low energy levels to higher energy levels


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