MDCAT Chemistry MCQ #960

During a flame test, potassium emits a violet flame. What causes this color based on atomic structure?

MDCAT Chemistry MCQ #960

  1. Question 1

    Q1. During a flame test, potassium emits a violet flame. What causes this color based on atomic structure?

    • A) Electrons in excited K atoms release visible light when returning to ground state
    • B) K atoms absorb violet light from the flame
    • C) K+ ions collide with air molecules to produce photons
    • D) Vibrational energy of K molecules increases in heat

    Answer: Electrons in excited K atoms release visible light when returning to ground state

    Explanation: Electron de-excitation emits photons at wavelengths corresponding to visible light. Option B reverses absorption/emission logic.