Thomson: The first person to discover electrons.

Rutherford: He was the first to put forward the concept of nucleus and pointed out that the mass of atoms is basically in the nucleus.

Rayleigh: He found that nitrogen fractionated from liquid air is slightly denser than nitrogen separated from ammonium nitrite.

Deviation that can't be ignored. The density of nitrogen fractionated from liquid air is 1.2572 g/cm3, while nitrogen is fractionated from subair by chemical method.

The density of nitrogen obtained directly from ammonium nitrate is 1.2505 g/cm3.

Copernicus: Heliocentrism

It's all from the physics book of Grade Two.