Group 7: Halogens

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Fluorine: Gas

Chlorine: Gas

Bromine: Liquid

Iodine: Solid

Astatine: Solid

  • Low melting and boling points
  • Diatomic molecules
  • Boling points increase down the group as there are more van der waals' forces
  • One electron fewer than the electronic configuration of a noble gas
  • An outer p sub-shell containing five electrons

Halogens are strong oxidising agents removing electrons in a reaction. The oxidising power of a


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