Question

experiments with gold foil indicated that atoms—
contain a negatively charged, dense center
usually have a uniform distribution of positive charges
usually have a uniform distribution of negative charges
contain a positively charged, dense center
clear all

Explanation:

Rutherford's gold - foil experiment showed that atoms have a positively charged, dense nucleus (center) and electrons orbit around it. The other options are incorrect: atoms have a positively charged dense center (nucleus), not a negatively charged dense center; positive charge is concentrated in the nucleus, not uniformly distributed; negative charge (electrons) is not uniformly distributed but is in orbitals around the nucleus.

Answer:

contain a positively charged, dense center.