2. Which is an impossible isotope of oxygen?
Fusion Beta particle emission nuclear transformation nuclear fission none of these
3. What is the result when Uranium-239 undergoes beta-particle emission, and then undergoes beta particle emission again?
232/90 Th 236/90 Th 235/94 Pu 239/94 Pu None of these
4. Gamma rays have:
0 protons, 1 neutron, 1 electron 0 protons, 0 neutrons, 0 electrons 1 proton, 0 neutrons, 1 electron 1 proton, 1 neutron, 1 electron None of these
5. What fraction of C-14 is left in a piece of wood cut from a tree 2000 years ago? (Note: the half-life of Carbon-14 is approximately 5730 years)
14% 28% 67% 76% None of these
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