J.J.+Thomson+b5


 * A British physicist and Nobel Laureate, credited for the discovery of the electron and of isotopes, and the invention of the mass spectrometer.
 * He was awarded the 1906 Nobel Prize in Physics for the discovery of the electron and his work on the conduction of electricity in gases.
 * He said the negatively charged electrons were embedded in a sphere of positive charge so the charges were balanced.