protium
The lightest and most common isotope of hydrogen, having a single proton and no neutrons: . It is the only stable nuclide with no neutrons.
Other meanings
An atom of this isotope.
“This radioactive decay leaves behind a protium as well.”
Related words
- diprotium
Where this comes from
This definition is adapted from “protium” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.