How did Ernest Rutherford change the atomic model? A. He showed that the atom could be divided into smaller particles.
B. He showed that electrons were located within an atom's nucleus.
C. He showed that the atom contained both positive and negative
charges
D. He showed that most of an atom's mass was located in the atom's
nucleus.

D. He showed that most of an atom's mass was located in the atom's

nucleus.

Explanation:

Ernest Rutherford changed the atomic model because of his experiment which was the gold foil experiment. A beam of alpha particles was aimed at a piece of gold foil, most particles passed through but some were scattered backward which showed that the middle of an atom (nucleus) is the where most of the mass is located.

the answer your looking for is c).