# In Rutherford's famous scattering experiments that ledto the planetary model of the atom, alpha particles (havingcharges of +2e and masses of 6.64 x 10-27 kg) were firedtoward a gold nucleus with charge +79e. An alpha particle, initially very far from the gold nucleus, is fired at 2.00 x 107m/s directly toward the nucleus, as in Figure P16.23. Howclose does the alpha particle get to the gold nucleus beforeturning around? Assume the gold nucleus remains stationary.79ev = 02e+ + +Figure P16.23

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When the alpha particle is at very far distance from the gold nucleus, potential energy will be negligible, but have appreciable kinetic energy. As the particle comes closer, kinetic energy decreases and potential energy becomes domina...

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