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.
Split the Atom Noisia Guests Producers Split the Atom Split the Atom is the debut studio album by Dutch drum and bass trio Noisia. The album was released on April 5, 2010 as a full-length CD as well as two double 12" EPs; the "Vision EP" includes four Drum and Bass tracks whilst the "Division EP" includes four Electro house/Breaks tracks. On February 27, 2012, Noisia released a special edition of "Split The Atom" on deadmau5's acclaimed label mau5trap. The first disc is the full-length original album while the second disc is a remix album with two original tracks, "Tommy's Theme" and "Could