Correct option is B
· Rutherford's alpha particle scattering experiment involved bombarding a thin gold foil with alpha particles.
· Most particles passed through undeflected, but some were deflected at large angles, and a few even bounced back.
· This led Rutherford to conclude that an atom has a small, dense, and positively charged
nucleus, surrounded by electrons.
· The discovery of
proton and
neutron came later.
·
Electron was discovered earlier by J.J. Thomson.
