P6: Radioactive Materials

P6.2 How can radioactive materials be used and handled safely, including wastes?P6.2 How can radioactive materials be used and handled safely, including wastes?

Nuclear Fusion Ernest Rutherford In 1909, Ernest Rutherford, Hans Geiger and Ernest Marsden tried firing positively charged alpha particles at thin foil. Most of these particles just went straight through but the odd one came straight back at them. This meant: Most of...

P6.1 Why are some materials radioactive?P6.1 Why are some materials radioactive?

Radioactivity Atoms Atoms consist of a nucleus and orbiting electrons. The nucleus of an atom contains protons and neutrons. It makes up most of the mass of the atom, but takes up virtually no space. The electrons that orbit the atom are really small. They whizz...