Hydrogen atom Hydrogen atom A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe. In everyday life on Earth, isolated hydrogen atoms (called "atomic hydrogen") are extremely rare. Instead, hydrogen tends to combine with other atoms in compounds, or with itself to form ordinary (diatomic) hydrogen gas, H. "Atomic hydrogen" and "hydrogen atom" in ordinary English use have overlapping, yet distinct, meanings. For example, a
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