Francis William AstonFRS(1 September 1877 – 20 November 1945) was a Britishchemistandphysicistwho won the 1922Nobel Prize in Chemistryfor his discovery, by means of hismass spectrograph, ofisotopesin many non-radioactive elements and for his enunciation of thewhole number rule.He was a fellow of theRoyal Societyand Fellow ofTrinity College, Cambridge. Fields: Chemistry, physics Education: Mason College University of London Trinity College, Cambridge