In heavy water, each hydrogen atom is indeed heavier, with a neutron as well as a proton in its nucleus. This isotope of hydrogen is called deuterium, and heavy water's more scientific name is ...

All three isotopes of hydrogen have identical chemical properties. This is because the number of electrons determines chemical properties, and all three isotopes have one electron in their atoms.

A team from Leipzig University and TU Dresden, as part of the Hydrogen Isotopes 1,2,3H Research Training Group, has made an important breakthrough in the efficient and cost-effective provision of ...