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NEET
Exam
NEET
Subject
Chemistry
Chapter
s Block Elements

NEET · Chemistry · s Block Elements

What causes alkali metals to impart characteristic colors to an...

What causes alkali metals to impart characteristic colors to an oxidizing flame?

Options

  1. AStrong metallic bonding
  2. BPresence of multiple valence electrons
  3. CWeak metallic bonding
  4. 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.
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