Question

Rutherford, Geiger, and Marsden (his students) fired a beam of alpha particles at a gold foil. The alpha particles had an energy of about 3.6 million electron volts, a charge of +2e, and a mass of about four AMU (one Atomic Mass Unit is 1.66 x 10-27 kg. Gold has atomic number 79.
How close could the alpha particles get to the gold nucleus?
bobpursley
when the KE is = PE...

PE=k(Q)q/d where Q is the +charge on the gold nucleus, q is the charge on the alpha particle

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