These experiments led to the idea of transmuting elements, with evidence for the process coming from the output of penetrating rays as the element transforms.
Much energy is given off, in various forms.
8-11 of RA and pp. We ll finish RA next week. Describe at least two pieces of experimental evidence which Rutherford knew about by 1903 that supported the idea of the transmutation of atoms. Get together as many coins as you can - at least 20, but 100 would be better. Spill them on the table.