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Atomic structure - Coggle Diagram

- - - - e.g. an atom has a proton no. of 7. This means the atom has 7 protons and electrons
  - - - it its also called the mass number
        
        nucleon number(A)=number of protons+number of neutrons
- - - - hydrogen-2 has a slightly higher boiling pt and density than hydrogen-1
      - both chlorine-35 and chlrone-37 react with sodium to produce sodium chloride
- - - - the electrons in the shell are known as valence and outer electrons
    - - elements in the same group have the same chemical properties that is due to the number of valence electrons in the atom of an element
        
        e.g. sodium(2,8,1) and potassium(2,8,8,1)have similar chemical properties as they both have 1 valence electron
- - - - relative charge of +1
      - has a relative mass of 1
      - represented by the symbol p
    - - has a relative charge of 0
      - relative mass of 1
      - represented by the symbol n
    - - has a relative charge of -1
      - has a relative mass of1/1840
      - represented by the symbol e