Definitions Of Abnormality - Robert Boyle - John Dalton - Henri Becquerel - JJ Thomson - Ernest Rutherford 0.0 / 5 ? PsychologyAbnormalityA2/A-levelAQA Created by: S_B_25Created on: 30-08-19 16:34 1661 Robert Boyle - Substances that couldn't be any simpler (chemical elements) 1 of 5 1803 John Dalton - Elements were composed of indivisible atoms 2 of 5 1896 Henri Becquerel - Discovered radioactivity (atom was not indivisible) 3 of 5 1897 JJ Thomson - Discovered the electron (first sub-atomic particle to be discovered) + proposed plum pudding model 4 of 5 1911 Ernest Rutherford - Most of the mass and positive charge was in a tiny central nucleus 5 of 5
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