How did rutherford's experiments demonstrate that thomson's model of the atom was incorrect? a. they showed that atoms have net positive charges. b. they showed that atoms are made up of smaller particles. c. they showed that electrons make up most of the mass of an atom. d. they showed that atoms have a dense nucleus.

Rutherford's Gold foil experiment involved the firing of atoms at a piece of gold foil only a few atoms thick. Rutherford expected that the particles would go straight through, but some were deflected. This experiment proved that atoms have a dense positively charged nucleus.

d. They showed that atoms have a dense nucleus.