Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________? Options: A . &nbspSmaller electronegativity of alkali metals B . &nbspSmaller ionic radius of these metals C . &nbspDe-excitation of electrons from higher energy levels to low energy level D . &nbspExcitation of electrons from low energy levels to higher energy levels

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

Question

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

Options:

A . Smaller electronegativity of alkali metals

B . Smaller ionic radius of these metals

C . De-excitation of electrons from higher energy levels to low energy level

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

Answer: Option C
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