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Radioactivity (Periodic Table Element (Mass number (number of neutrons and…

- - - - Negative part (Electrons) are around the edge
      - Not so big
  - - - with smaller negative charges inside the plum pudding
- - - - Stopped by aluminium
      - electron from protons and neutrons
      - electron
        
        Negative charge
    - - Lead hurts it's numbers
      - Pure energy
      - travels the fastest
    - - Stopped by paper
      - 2 protons and 2 neutrons
        
        Positive charge
      - Helium nucleus