AQA GCSE Combined Science Trilogy · 8464
Specification 5.1.1.3, 5.1.1.4, 6.4.1.1 · Paper 3, Paper 5
A negatively charged particle found within atoms.
Revise: Development of the Atomic ModelThomson discovered the electron, a negatively charged particle within the atom. If atoms contained smaller particles, they could not be indivisible spheres.
- Revise: Charges of Subatomic Particles
A subatomic particle with a relative electrical charge of −1, occupying shells around the nucleus.
- Revise: Structure of an Atom
A negatively charged particle with a very small mass, found outside an atom’s nucleus.