Hey guys, having trouble with my science homework and can't find the answers. First question When a human body is exposed to external nuclear radiation, the amount of tissue damage depends on the _________ power of the radiation. I have no idea Next question Although the fusion of hydrogen to produce helium is the most common fusion reaction occurring in the sun, several other fusion reactions occur. In one of these, two helium-4 nuclei fuse to form one unstable _____ nucleus. Is it beryllium-8? Last Why is the prefix halo used in halocarbon? Can't find the answer. I might have some more tomorrow. Thanks for any help.