Atom to the positively charged nucleus by the attraction created from opposite electric charges. If an atom has more or fewer electrons than its atomic number, then it becomes respectively negatively or positively charged as a whole; a charged atom is called an ion. Electrons have been known since the late 19th century, mostly thanks to J.J. Thomson; see history of subatomic physics for details. Protons have a positive charge and a mass 1,836 times that of the electron, at . The number of protons in an atom is called its atomic number. Ernest Rutherford (1919) observed that nitrogen under alpha-particle
Mister Atom threatening to cause the destruction of the world using the machinery. By now the world officials had decided to give in to Mr Atom and sent a delegation. But once again he was apparently destroyed, this time in an atomic furnace when the engines were turned on when Marvel disguised himself as part of the delegation to block Mister Atom from the machinery. However, Mister Atom was re-introduced in 1976, by which time DC Comics had purchased the rights to use the Captain Marvel characters; Captain Marvel's enemy King Kull used his advanced scientific acumen to bring Atom back to