J.J. Thomson
Sir Joseph John "J.J." Thomson (born 18 December 1856 - 30 August) was a British physicist. He is most credited for his Cathode Ray Experiment, with which he discovered negatively charged particles called the Electron. He is also known for his discovery of Isotopes (atoms which have the same proton number but different neutron numbers).
In 1906, he was awarded the Nobel Prize in Physics for the discovery of the electron and for his work on the conduction of electricity in gases. Atoms are "Plum Pudding"J.J. Thomson assumed that the body of an atom was sphere shaped in which n electrons were contained in a jelly-like substance. The jelly like substance had a relatively positive charge which cancelled the negative charge of the electrons. His atoms can be imagined to be like plum pudding, raisin bread or chocolate cookies.
|