protium

Definitions

1. The lightest and most common isotope of hydrogen, having a single proton and no neutrons: ¹₁H. It is the only stable nuclide with no neutrons.
2. An atom of this isotope.

Equivalents

Examples

“So far there are no differences among the protiums extracted at various labs, except for concentration levels.”

“This radioactive decay leaves behind a protium as well.”

CEFR level