Question

6 when scientists were originally trying to determine what was inside an atom, they directed a beam of positive helium ions at the atom. they found they were deflected away from the center of the atom, what we now know is a positive nucleus. what caused the deflection? the attraction of the positive helium ions to the electron cloud the repulsion of the positive helium ions from the positive nucleus. the repulsion of the positive helium ions from the negative nucleus. the attraction of the positive helium ions to the positive nucleus.

Explanation:

Like - charges repel each other. Positive helium ions and the positive nucleus have the same charge, so the positive helium ions are repelled by the positive nucleus, causing deflection.

Answer:

The repulsion of the positive helium ions from the positive nucleus.