379ChemistryMedium
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
ADe-excitation of electrons from higher energy levels to low energy level
BExcitation of electrons from low energy levels to higher energy levels
CSmaller ionic radius of these metals
DSmaller electronegativity of alkali metals
Correct answer
A. De-excitation of electrons from higher energy levels to low energy level
Explanation
De-excitation of electrons from higher energy levels to low energy level is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.