Thomson passed a very high electric charge in a vacuum tube containing different gases. He observed a flow of identical negatively charged particles, irrespective of the gases present in the cathode tube. He measured the charge and mass of the particles. From the cathode ray tube experiments concluded that
- Atoms can be broken into smaller particles. Thomson, disproved that the Daltons theory of indestructible nature of atom
- All atoms contain negatively charged particles, which he named as ‘corpuscles’. Corpuscles are much smaller than atom itself.
- Corpuscles from all atoms are same. So, corpuscles are fundamental charged particles of atom.
Thomson’s corpuscles are known today as ‘Electrons’.