4. In the gold foil experiment, most of the positively charged alpha particles passed through
the gold foil, but some were deflected or bounced back. What did we conclude because
of this?
A. Light is a wave, not a particle.
B. Atoms are small indivisible spheres.
C. Atoms have negatively charged particles which orbit the nucleus.
D. Atoms are mostly empty space with a small, dense, positive center.​