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Chemistry (C1 (Crystallisation Steps (Pour salt into solution, Mix the…

- - - - Middle of the nucleus
      - Contains protons and neutrons
      - Positively Charged
    - - Move Around the nucleus in electron shells
      - No virtually no mass
      - Negatively Charged
  - - - Atoms have no charge
  - - - Plum Pudding Theory
        
        The atom has a ball of positive charge with electrons stuck in it
    - - Fired alpha particles at a thin sheet of gold
        
        Expected to go straight through but many were completely deflected
- - - - they can be single atoms or groups of atoms