Atom bombardment ejects what appeared to be hydrogen nuclei. By 1920 he had accepted that the hydrogen nucleus is a distinct particle within the atom and named it proton. Neutrons have no electrical charge and have a free mass of 1,839 times the mass of the electron, or , the heaviest of the three constituent particles, but it can be reduced by the nuclear binding energy. Neutrons and protons (collectively known as nucleons) have comparable dimensions—on the order of —although the 'surface' of these particles is not sharply defined. The neutron was discovered in 1932 by the English physicist James Chadwick.
The History and Adventures of an Atom The History and Adventures of an Atom The History and Adventures of an Atom, by Tobias Smollett, is a novel that savagely satirises English politics during the Seven Years' War. It appears under the guise of a tale from ancient Japan. Pitt the Elder appears as "Taycho", and other politicians, monarchs and nations under a light disguise of made-up names. It includes some comments on Britain's growing problems with its American colonies. The 'atom' is the supposed narrator, a witness to the events and somehow able to communicate them to modern listeners. Smollett is referring back to the ancient Greek