All of the radiation passes through the foil None of the radiation passes through the foil, it is all absorbed Some of the radiation passes through the foil and some is absorbed Aluminium is a beta emitter
An alpha emitter with a long half life A beta emitter with a long half life An alpha emitter with a short half life A gamma emitter with a short half life
An alpha emitter with a long half life A beta emitter with a long half life A gamma emitter with a short half life Radioactive materials are never injected into blood because they are too dangerous
Alpha particles Beta particles Gamma rays Radioactivity can not be used for sterilisation
Alpha particles Beta particles Gamma rays Radioactivity can not be used to treat cancer
Alpha particles Beta particles Gamma rays No form of radioactivity is harmful when it is outside of the body