Electrons around atoms can absorb and emit photons of particular colours of light -- see three different atomic models explain what's going on.
Key concepts: atomic models (Bohr, energy staircase and electron density), photons, energy levels, absorption, emission
Play the game: http://splash.abc.net.au/web/zoom/home
ABC Zoom is a science-based game set in deep space.
The space ship Polaris has come under attack. The ship and her captain have sustained damage that can only be repaired at the molecular or cellular level.
Your mission: Use the futuristic tool you'll find on the ship to zoom down to the microscopic and atomic levels, reviving the captain and her ship.
See more videos: http://splash.abc.net.au/web/zoom/science"