Question

multiple-choice question why did rutherford propose that there was a small, dense mass located within the atom? because some of the alpha particles bounced/deflected off of the atoms at angles because none of the alpha particles were able to pass through the atom because all of the alpha particles passed straight through the atom rewatch next question

Explanation:

Rutherford's gold foil experiment involved firing alpha particles at a thin gold foil. Most alpha particles passed through, but some were deflected at large angles or bounced back. This deflection indicated a small, dense, positively - charged mass (the nucleus) within the atom, as the positively - charged alpha particles were repelled by this dense mass. The option "because none of the alpha particles were able to pass through the atom" is incorrect as most alpha particles did pass through. The option "because all of the alpha particles passed straight through the atom" is also incorrect as some were deflected. The correct reason is that some alpha particles bounced/deflected off the atoms at angles.

Answer:

A. because some of the alpha particles bounced/deflected off of the atoms at angles