🔴 ¿Cómo se descubrió el PROTÓN y el NEUTRÓN? ⚡ ¿Qué son y quién los descubrió?
The Discovery of Protons and Neutrons
The Initial Discovery of Protons
- The discovery of protons began with the observation of particles behaving oppositely to electrons in a modified cathode ray tube.
- These particles were known to depend on the nature of the gas inside the tube, specifically their charge-to-mass ratio.
- In 1919, Ernest Rutherford discovered these particles, naming them protons while studying alpha particle scattering by nitrogen atoms.
Key Experiments and Findings
- Rutherford concluded that a hydrogen nucleus was expelled from nitrogen during nuclear collisions, marking an early understanding of atomic structure.
- He noted discrepancies between the total mass of an atom and the sum of its fundamental particles, suggesting another particle existed.
The Discovery of Neutrons
- In 1932, James Chadwick demonstrated the existence of neutrons—particles with no charge found in atomic nuclei.