deuterium

https://doi.org/10.1351/goldbook.D01648
A specific name for the atom 2H. The @C00907@ 2H+ is a @D01649@ the species 2H is a @D01646@ @A00358@ and 2H is the @D01647@ group.
Source:
PAC, 1988, 60, 1115. (Names for hydrogen atoms, ions, and groups, and for reactions involving them (Recommendations 1988)) on page 1116 [Terms] [Paper]