Which chemical element produces green colour in firework displays?

Question

Accepted Answer

1. **Barium gives green light.** In fireworks, barium compounds burn with a green flame.
2. **Why:** Electrons $e^-$ in barium atoms get excited by heat and then fall back. They emit photons in the green wavelength.
3. **Compare:** Strontium makes red, sodium makes yellow, copper tends to make blue/green.
4. **Conclusion:** The green colour comes from barium.

FINAL_ANSWER: b

Answer

Answer

Answer