NEETChemistrys Block Elements
What causes alkali metals to impart characteristic colors to an oxidizing flame?
Options
- AStrong metallic bonding
- BPresence of multiple valence electrons
- CWeak metallic bonding
- DAbsence of valence electrons
Correct answer
B. Presence of multiple valence electrons
Step-by-step solution
Alkali metals impart characteristic colors to an oxidizing flame because the heat from the flame excites the outermost orbital electron to a higher energy level, and when it returns to the ground state, radiation in the visible spectrum is emitted due to the presence of multiple valence electrons.