Answer:
A. The atom is mostly empty space.
B. Electron orbit around the center of the atom.
C. The atom's positive charge is located in the atom's nucleus.
Explanation:
Rutherford is a chemist which performnan experiment in order to see what is present inside the atom. He bombarded radiation from a source on an atom. He observed that most of the radiation pass through the atom so he concluded that the atom has mostly empty while some comes back which means that a heavy particles are present in the nucleus.