The evolution of atomic theory spans from ancient Greek philosophers to modern scientists, showcasing remarkable developments in our understanding of matter's fundamental structure. Democritus pioneered the concept of atoms, while scientists like John Dalton, J.J. Thomson, and others progressively refined atomic models through experimental evidence.
Key developments include:
- Ancient Greek atomic theory by Democritus (450 BC)
- Dalton's atomic theory establishing fundamental principles (1803)
- Discovery of electrons by J.J. Thomson (1897)
- Nuclear model development by Rutherford (1909)
- Introduction of electron shells by Bohr (1913)
- Discovery of neutrons by Chadwick (1932)
- Modern shell model by Goeppert-Mayer (1949)
