Deuterium is an isotope of hydrogen. The nucleus of a deuterium atom consists of one proton and one neutron. When two deuterium nuclei fuse, helium-3 is formed, and a neutron is emitted. Which equation illustrates this process? O 2H2 + O2 2H20 0 2 H H + H 0 21H > H+qe 0 2 H Het in