DefinitionA <HYDROGEN> is an <Atom> and a <CHEMICAL ELEMENT> with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table
Class name from IUPAC naming convention, Standard state: gas, Colour: colourless, Discoverer: Henry Cavendish, Date discovered: 1766, Discovered at: London, England, Meaning of name: Gr. "hydro", w
