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.
Ariel Atom Atom 4. The limited production Ariel Atom 500 V8 featured a V8 engine. The all new Ariel Atom 4 is the latest Atom featuring a new turbocharged 2.0l engine that is used in the Honda Civic Type R with 3-stage boost. The Ariel Atom features a prominently visible chassis (i.e., an exoskeleton, no roof or windows, a small optional windscreen) and a drag coefficient of 0.40. The Atom began as a student project by Coventry University transport design student, Niki Smart. Known then as the LSC (Lightweight Sports Car), it was developed at the university in 1996 with input and