In an alpha scattering experiment, few alpha particles rebounded because I. Most of the space in the atom is occupied II. Positive charge of the atoms very little space III. The mass of the atom is concentrated in the centre IV. All the positive charge and mass of the atom is concentrated in small volume
(d) all positive charge and mass of the atom is concentrated in a small volume. Explanation: In the α-scattering experiment, few α-particles rebounded because all positive charge and mass of the atom are concentrated in a small volume known as the nucleus of the atom.