In Rutherford's Famous Experiment,alpha Particles of Mass 6

question 49

Multiple Choice

In Rutherford's famous experiment,alpha particles of mass 6.64 * 10^-27 kg and charge + 2e were fired directly at a gold nucleus (charge + 79e) with a speed of 3 * 10⁷ m/s.Due to the Coulomb repulsive force the alpha particles slowed down and eventually came to rest momentarily before turning around.The distance alpha particles came closest to the gold nucleus before turning around was

• A)27.4 fm.
• B)15.1 fm.
• C)12.1 fm.
• D)9.8 fm.
• E)5.4 fm.

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