Just How Small is an Atom? - TED Ed
This video examines the relative sizes of atoms, neutrons, protons and electrons.
The resource is a TED Ed video (5:27 min) which could be used as an introduction to a unit, or to consolidate understanding on subatomic particles.
It also examines the density of an atomic nucleus in terms of six million cars squashed into a 1-metre square box.
Australian Curriculum v9 Codes: AC9S7U05 (Year 7), AC9S8U06 (Year 8), AC9S9U06 (Year 9)
