Lead and Iodine, Lead Iodide question?

  1. **EDIT** Never mind just realised that it is lead(II) in PbI2. Hehe... Awkward
    Why does lead iodide have the formula PbI2?
    Pb needs to lose (or gain) 4 electrons to have a stable octet and Iodine needs to gain only 1. So why isn't the equation PbI4? It seems like it should be... Please explain if you can.
    Thanks :)
     
    Last edited: Sep 7, 2013
  2. jcsd
  3. SteamKing

    SteamKing 9,931
    Staff Emeritus
    Science Advisor
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    Lead is one of those elements with multiple oxidation states (either +2 or +4). The most common state is +2, which is why lead iodide is PbI2
     
  4. Haha I just realised. Thanks :D
     
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