Write the conclusions drawn by Rutherford when he observed the following.
(i) Most of the a-particles passing straight through the gold foil.
(ii) Some a-particles getting deflected from their path.
(iii) Very small fraction of a-particles getting deflected by 180°.
(i) Most of the space inside the atom is empty.
(ii) The positive charge of the atom occupies very little space.
(iii) All the positive charge and mass of the atom were concentrated in a very small volume called nucleus.