Know that ionising nuclear radiation can be measured using a detector connected to a counter

Describe how the scattering of alpha (α) particles by a sheet of thin metal supports the nuclear model of the atom, by providing evidence for: (a) a very small nucleus surrounded by mostly empty space (b) a nucleus containing most of the mass of the atom (c) a nucleus that is positively charged

Describe experiments to distinguish between good and bad absorbers of infrared radiation