Noun
(chemistry) The divalent radical formed from two separate hydrogen atoms or ions
(chemistry, modifying a noun) Describing a dihydrogen bond
(inorganic chemistry) The hydrogen molecule H2
Source: en.wiktionary.orgFor dihydrogen, each nucleus is a proton of spin 1/2, so that it can be shown using quantum mechanics and the Pauli exclusion principle that the odd rotational levels are more populated than the even levels. Source: Internet
Hydrogen gas (dihydrogen or molecular hydrogen) citation is highly flammable and will burn in air at a very wide range of concentrations between 4% and 75% by volume. Source: Internet
This is particularly true of reducing solutions: the solutions of the alkali metals mentioned above are stable for several days, slowly decomposing to the metal amide and dihydrogen. Source: Internet