Electron was discovered by

The electron was discovered by J J Thomson in 1897 during experiments with cathode rays. He observed that the rays were made of negatively charged particles which were later called electrons. This discovery proved that atoms were not indivisible as previously thought but contained smaller subatomic particles. The identification of the electron revolutionized physics and chemistry leading to the development of atomic models. Thomson work laid the foundation for modern electronics and quantum theory. Understanding electrons is central to explaining electricity magnetism and chemical bonding. The correct answer is option B J J Thomson.