what subatomic particles did jj thomson discover?
Electron
entailment
 In 1995 , a gas of rubidium atoms cooled down to a temperature of 170 nK was used to experimentally realize the Bose – Einstein condensate , a novel state of matter originally predicted by S. N. Bose and Albert Einstein , wherein a large number of atoms occupy a single quantum state . 

neutral
 That same year , J.J. Thomson conducted an experiment in which he channeled a stream of neon ions through magnetic and electric fields , striking a photographic plate at the other end . He observed two glowing patches on the plate , which suggested two different deflection trajectories . Thomson concluded this was because some of the neon ions had a different mass . The nature of this differing mass would later be explained by the discovery of neutrons in 1932 . 

entailment
 The following year , they published a retraction after researchers at other laboratories were unable to duplicate the results and the Berkeley lab itself was unable to duplicate them as well . In June 2002 , the director of the lab announced that the original claim of the discovery of these two elements had been based on data fabricated by principal author Victor Ninov . 

entailment
 The main focus of the Radiation laboratory at this time was the development of the cyclotron , and McMillan , who was appointed to the faculty at Berkeley as an instructor in 1935 , soon became involved in the effort . His skill with instrumentation came to the fore , and he contributed improvements to the cyclotron . In particular , he helped develop the process of " shimming " , adjusting the cyclotron to produce a homogeneous magnetic field . Working with M. Stanley Livingston , he discovered oxygen @-@ 15 , an isotope of oxygen that emits positrons . To produce it , they bombarded nitrogen gas with deuterons . This was mixed with hydrogen and oxygen to produce water , which was then collected with hygroscopic calcium chloride . Radioactivity was found concentrated in it , proving that it was in the oxygen . This was followed by an investigation of the absorption of gamma rays produced by bombarding fluorine with protons . 

contradiction
 The thesis was good enough , though , for Burhop to be awarded an 1851 Exhibition Scholarship to study at Cambridge University 's Cavendish Laboratory under Lord Rutherford in 1933 . The scholarship included a first @-@ class ticket to London on the liner RMS Oronsay . At this time the Cavendish Laboratory was one of the leading centres of physics in the world . In 1932 , Cavendish laboratory scientists John Cockcroft and Ernest Walton split the atomic nucleus , James Chadwick discovered the neutron , and Patrick Blackett and Giuseppe Occhialini confirmed the existence of the positron . Burhop was supervised by a fellow Australian , Mark Oliphant . He was initially assigned a task of investigating the diffusion of positive alkali metal ions on hot metal surfaces , but soon switch to a more interesting subject , the measurement of the excitation function for the pairs of deuterons producing a triton through nuclear fusion : 
