noun
- the most common isotope of hydrogen, having one proton and no neutrons in its nucleus
Usage: chemistry; physics
Examples
- Protium makes up about 99.98% of all naturally occurring hydrogen.
- The scientist studied the differences between protium and deuterium.
- Water molecules containing protium are lighter than heavy water.
- Protium has an atomic mass of approximately 1.008.
- Nuclear fusion reactions often involve protium as a starting material.
- The researcher separated protium from other hydrogen isotopes.