A planetary nebula NGC 6543 Illustration Play

Bohr model Whiteboard exercise Play

Bohr model Student activity Play

Early models of an atom Animation Play

Energy levels Simulation Play

Energy levels Whiteboard exercise Play

Energy levels Student activity Play

Galaxies, clusters and nebulae Student activity Play

Galaxies, clusters and nebulae Illustration Play

Galaxies, clusters and nebulae Whiteboard exercise Play

Models of the atom Student activity Play

Models of the atom Whiteboard exercise Play

Movement of an electron between the levels Whiteboard exercise Play

Orbits of electrons Animation Play

Quantum atom model Animation Play

Rutherford's experiment Animation Play

Rutherford's experiment Whiteboard exercise Play

The inner structure of the atom Student activity Play

The planetary model of the atom Animation Play

The size of a nucleus and an atom Animation Play

The size of an atom and a nucleus Student activity Play

White dwarves Student activity Play