hydrogen has definitions from the field of chemistry
[ noun ] (chemistry) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe


atomic_number_1 H

Used in print


So_be_it - then we must embark_on a crash program for 200 - megaton_bombs of the common or hydrogen variety , and neutron_bombs , which do not exist but are said to be the coming thing .

(James A. Ibers et al., "Proton magnetic resonance...)

The nuclear dipole effects provide some information on the motions of the hydrogen nuclei , but the symmetry of the **f bond in **f remains in doubt .

**f appeared to be well suited for the study of these matters , since it is a normal paramagnet , with three unpaired electrons on the chromium , its crystal structure is very simple , and the unknown position of the hydrogen in the strong **f bond provides structural interest .