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.
Captain Atom the atmosphere the shockwave hits her directly and leaves her in a coma. While Atom dies, Superman survives, going on to continue his Regime. The rights to Captain Atom and most other Charlton characters were purchased by DC Comics in the early 1980s. Originally, these Charlton characters were to be reintroduced in writer Alan Moore's limited series "Watchmen". However, this would render the characters unusable for future stories. Thus new characters, inspired by the Charlton originals were used instead. "Watchmen"'s Doctor Manhattan is based on Captain Atom, and like Captain Atom, gained similar powers through a similar scientific mishap. Captain