Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
The "Plum Pudding" model, proposed by J.J. Thomson, suggests that an atom is made up of a positively charged sphere with negatively charged electrons embedded within it.
Related terms
Alpha Particles: These are positively charged particles consisting of two protons and two neutrons. They were used in the Gold Foil Experiment to probe the structure of atoms.
Gold Foil Experiment: This experiment conducted by Ernest Rutherford involved firing alpha particles at a thin gold foil to investigate the structure of atoms.
Electron Cloud Model: This model describes electrons as existing in regions called orbitals or electron clouds around the nucleus of an atom.