who discovered electron

The electron was discovered by the British physicist Sir Joseph John "J. J." Thomson in 1897. Thomson's study of cathode rays led to the realization that these rays were composed of very small, negatively charged particles, which he initially called "corpuscles" but are now known as electrons. He demonstrated that these particles were much smaller than atoms and are a fundamental constituent of all atoms, which was a revolutionary discovery in understanding atomic structure. Thomson was awarded the Nobel Prize in Physics in 1906 for his work on the conduction of electricity by gases, which encompassed his discovery of the electron. This discovery disproved the earlier notion that atoms were indivisible and paved the way for modern atomic theory.