C4

• reactivity in the group 0 - noble gases

  unreactive
• reactivity in group 1

  
  

  -reactivity increases down the group

  -there are more shells around the nucleus

  -meaning the outer shell is further away from the nucleus

  -so the attraction is weaker

  -making it easier to loose an electron
• reactivity in the group 7 - halogen


  -reactivity decreases down the group

  -there are more shells around the nucleus

  -meaning the outer shell is further away from the nucleus

  -so the attraction is weaker

  -making it harder to gain an electron
• group 7 - halogens

  -melting point increases down the group

  -boiling point increases down the group

  -7 atoms in outer shell

  -non metals
• group 0 - noble gases

  -boiling pt increases down the group

  -full outer shells
• group

  -1 electron in the outer shell

  -reacts with oxygen, chlorine and water
• litium flame test

  red flame
• sodium flame test

  yellow
• potassium flame test

  lilac
• calcium flame test

  orange-red
• copper flame test

  green