Explain how the results of Ernest Rutherford's gold-foil experiment showed that the atom is mostly empty space.

The gold foil experiment demonstrated that most of an atom is empty space with a very small positively charged nucleus in the middle. His result was that 99.995% α-particles were not deflected. This proved that atoms had an inner core that contained most of the mass of an atom and was positively charged.

Here this photo will explain Rutherford's experiment.