Structure of Atom

Isotopes: It has been observed that many elements have nuclei which contain the same number of protons but different number … Read more

Discovery of Neutron: In 1932, Sir James Chadwick discovered the third subatomic particle. He directed a stream of alpha particles … Read more

Positive Rays: In 1886, Eugen Goldstein used a discharge tube with a hole in the cathode. He observed that while … Read more

Discovery of Electron: The first of the subatomic particles to be discovered was the Electron (e). The knowledge about the … Read more