Bohr's Model of the Atom (AQA GCSE Physics): Revision Notes

4.1.8 Bohr's Model of the Atom

1913 - Bohr

• Produced the final model of the atom

Bohr Model:

• Electrons exist in fixed 'orbitals'
• If Rutherford was right, the electrons in the cloud close to the nucleus would get attracted, and cause the atom to collapse.
• So now the electrons exist in fixed 'orbitals'

Later developments:

• Positive charge of the nucleus could be subdivided into smaller particles, each with the same amount of charge – the proton
• 20 years after the 'nucleus' was an accepted scientific idea, James Chadwick provided evidence to prove neutrons existed (specifics not needed)