Deuterium has one proton and one neutron in its nucleus surrounded by one electron. Is deuterium an element, an ion, an isotope, and/or a molecule? Why?
a. Deuterium is an ion of hydrogen because it has fewer electrons than hydrogen.
b. Deuterium is an element next to hydrogen, because it has one proton more than hydrogen.
c. Deuterium is an isotope of hydrogen because it has one neutron more than hydrogen.
d. Deuterium is an ion of hydrogen because it has more electrons than hydrogen.