Halogenoalkanes

• Why is the ozone layer beneficial for living organisms

  • absorbs harmful UV
• explain how CFC form chlorine atoms in the upper atmosphere

  uv light breaks C - Cl bonds
• Explain why the halogenoalkane is attached by the nucleophile

  • bromine is more electronegative than carbon
  • carbon is partially positive
  • lone pair of electrons on nucleophile donated to the partially positive carbon