Rutherford's Experiment,in Which Alpha Particles Were Aimed at a Thin

Multiple Choice

Rutherford's experiment,in which alpha particles were aimed at a thin piece of gold,led to what understanding?

A) Neutrons existed.
B) Electrons existed and have a negative charge.
C) The number of electrons can be determined by the mass number and atomic number.
D) Electrons can be promoted to higher energy by absorbing energy.
E) An atom is mostly empty space.