Give the evidence for the existence of nucleus in an atom.
Ans-The evidence for the existence of nucleus in an atom is given by E.Rutherford.He explained this by the alpha-particle scattering experiment .In that some alpha particles were passed through the gold foil.Some alpha particles(Helium 2 positive ions) we're deflected back.From this experiment he concluded that almost all the Mass of an atom is concentrated in it's nucleus.
Protons+Neutrons=Nucleus of an atom.

Please check my answer to this question.
No links plz.