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In the Rutherford scattering experiment, a beam of alpha ...

In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that

A.

a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume

B.

the gold nucleus is positively charged and is concentrated in a tiny volume

C.

the gold nucleus emitted alpha particles

D.

the gold nucleus is concentrated in a tiny volume and contains alpha particles

Correct answer is B

No explanation has been provided for this answer.