Final answer:
C) Deuterium
The name given to 2H is Deuterium, which contains one proton and one neutron in its nucleus and is a naturally occurring isotope of hydrogen.
Step-by-step explanation:
The name given to 2H is Deuterium. The isotopes of hydrogen vary by the number of neutrons found in the nucleus of the atom. In the case of deuterium (2H), there is one proton and one neutron in its nucleus. Deuterium is a naturally occurring isotope of hydrogen and is sometimes symbolized as D. The most common isotope is protium (¹H) with just one proton and no neutrons, whereas tritium (³H) has one proton and two neutrons and is much less common than deuterium.