AQA GCSE Chemistry · 8462

History of the Atomic Model

What you need to know

Explain how new experimental evidence leads to changes in scientific models.
Contrast the plum pudding model with the nuclear model of the atom.
Explain why the alpha particle scattering experiment led to the conclusion that mass is concentrated in a charged nucleus.
Describe Niels Bohr's adaptation of the nuclear model regarding electron orbits.
Describe the discovery of the proton and the neutron (Chadwick).