DISCOVERY OF NUCLEUS

RUTHERFORD EXPERIMENT: POSITIVE ALPHA PARTICLES STRIKE GOLD FOIL. SOME PASS THROUGH; SOME DEFLECTED; SOME REPULSED. IT PROVES THAT GOLD ATOMS HAS LOT OF EMPTY SPACE. POSITIVE NUCLEUS OCCUPIES ONLY SMALL SPACE AT THE CENTER OF THE ATOM. HENCE SOME ALPHA PARTICLES ARE REPELLED BY IT.