Which one of the following is the chemical name of heavy water ?

Heavy water is chemically known as deuterium oxide, represented by the formula D2O [2]. It is a compound formed by oxygen and deuterium, which is a stable isotope of hydrogen containing one proton and one neutron in its nucleus. This extra neutron makes deuterium approximately twice as heavy as the common hydrogen isotope, protium. While heavy water is physically similar to ordinary water (H2O), it possesses a higher density (1.1079 g/cm³), a higher freezing point (3.82 °C), and a higher boiling point (101.42 °C) [2]. It is primarily used as a moderator and coolant in nuclear reactors, such as Pressurized Heavy Water Reactors (PHWRs), due to its unique nuclear properties. Unlike ordinary water, it is not radioactive in its pure form.

Sources

1. [1] https://pubchem.ncbi.nlm.nih.gov/compound/Deuterium-Oxide
2. [2] https://pmc.ncbi.nlm.nih.gov/articles/PMC9346379/