(N/A) Rutherford concluded from the $\alpha -$ particle scattering experiment that:
$(i)$ Most of the space inside the atom is empty because most of the $\alpha -$ particles passed through the gold foil without getting deflected.
$(ii)$ Very few particles were deflected from their path,indicating that the positive charge of the atom occupies very little space.
$(iii)$ $A$ very small fraction of $\alpha -$ particles were deflected by $180^o$,indicating that all the positive charge and mass of the gold atom were concentrated in a very small volume within the atom.
From the data,he also calculated that the radius of the nucleus is about $10^5$ times smaller than the radius of the atom.