The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and ...

has made an important breakthrough in the efficient and cost-effective provision of isotopes. These are the three forms in which hydrogen occurs in nature—as protium, deuterium or tritium.

The most common isotope of hydrogen is called protium, or hydrogen-1. The 1 refers to the total number of protons and neutrons together in a particular isotope. Hydrogen-1 atoms are made up of a ...