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

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

B. Smaller electronegativity of alkali metals

C. Smaller ionic radius of these metals

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

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.