Group 7 (Halogens)

• Describe the electronic structure of the halogens.

  They have 7 electrons in their outer shell, and only need 1 to become fully stable so are fairly reactive.
• State the type of element halogens are and describe what their molecules consist of.

  • Non-metals
  • Diatomic molecules (made out of pairs of atoms)
• Describe the type of compounds formed when halogens react with metals

  • ionic compound
• Describe the type of compounds formed when they react with non-metals 

  • covalent molecular compounds
• Explain the trend in reactivity as you go down Group 7 ( The Halogens)

  • In Group 7, the reactivity of the elements decreases going down the group.
• Explain displacement reactions involving halogens and solutions of their salts. 

  A more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt.