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.
Olaf—An Atom he recovers, alone and forgotten by those he has helped. He then moves aimlessly along. Directed by Anthony O'Sullivan and written by William E. Wing, "Olaf—An Atom" was produced by the Biograph Company and released May 19, 1913, in the United States. The drama was released August 4, 1913, in the United Kingdom. The film was retitled "The Wanderer" and re-released by the Aywon Film Corporation, a New York City company formed in early 1919. Aywon reissued films including the Biograph Company short films, which were often lengthened by the addition of intertitles. Olaf—An Atom Olaf—An Atom is a 1913