What did thomson discover about the atom?

J.J. Thomson discovered electrons and noticed that an atom can be divided. Also, he concluded atoms are made of positive cores and negatively charged particles within it. He developed the Plum Pudding Model before the atomic nucleus was discovered. read more

Plaque commemorating J. J. Thomson's discovery of the electron outside the old Cavendish Laboratory in Cambridge Thomson was elected a Fellow of the Royal Society (FRS) and appointed to the Cavendish Professorship of Experimental Physics at the Cavendish Laboratory, University of Cambridge in 1884. read more

Joseph John Thomson discovered that thee was a negatively chargedparticle in the atom. He is credited with discovering the electron.He also invented the mass spectrometer. read more