Chemistry J.J. Thomson of Cambridge University discovered the electron and soon after the French scientist Becquerel as well as the couple Pierre and Marie Curie investigated the phenomenon of radioactivity. In a series of pioneering scattering experiments Ernest Rutherford at the University of Manchester discovered the internal structure of the atom and the existence of the proton, classified and explained the different types of radioactivity and successfully transmuted the first element by bombarding nitrogen with alpha particles. His work on atomic structure was improved on by his students, the Danish physicist Niels Bohr and Henry Moseley. The electronic theory of chemical
Nitrogen-13 proton needs to carry extra energy to produce the nuclear reaction. The energy difference is actually 5.22 MeV, but if the proton only supplied this energy the reactants would be formed with no kinetic energy. As momentum must be conserved, the true energy that needs to be supplied by the proton is given by: Nitrogen-13 plays a significant role in the CNO cycle, which is the dominant source of energy in stars heavier than the Sun. Lightning may have a role in the production of nitrogen-13. Nitrogen-13 Nitrogen-13 is a radioisotope of nitrogen used in positron emission tomography (PET). It