Flames & Fireworks

Atoms that emit

An interactive lesson with 5 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Hot atoms emit sharp lines: element fingerprints.
• Fireworks: Sr red, Na yellow, Ba green, Cu blue.

Steps

1. Excited atoms
2. One jump, one colour
3. Design a firework
4. The sodium photon
5. Helium from the Sun