Chemistry..

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For the lewis structure of BCl3, does it have a total of 24 valence electrons? Also does it have a total of 4 bonds? If possible can you draw the lewis structure?

  • Chemistry.. -

    Yes it has 24 electrons. It can't have but three bonds since there are only three atoms hooked to it (the three Cl atoms). I can't draw the Lewis dot structure on this forum but here is a site that shows it. Frankly I don't like the way this site does it but the structure is correct.

  • Chemistry.. -

    But when I take the total number of electrons needed to be "happy" subract the total number of valence electron the result is 4 bonds.
    1*8=8
    3*8=24
    24+8=32

    1*3=3 valence electrons
    3*7=21 valence electrons
    Total valence electron: 24
    so... 32-24=8/2=4

  • Chemistry.. -

    By the way, is that correct??

  • Chemistry.. -

    B doesn't obey the octet rule. Look at that structure again at the site and you will see B has only 6 electrons while each Cl has 8.

  • Chemistry.. -

    There can be only three bonds for obvious reasons even if B obeyed the octet rule. That's because there are only three Cl atoms; what else would you add to make the fourth bond?

  • Chemistry.. -

    So would N2 have two bonds then?

  • Chemistry.. -

    I don't think you posted the site.

  • Chemistry.. -

    Excuse me! Here is the site. Sorry about that.
    http://biochemhelp.com/lewis-structure-for-bcl3.html

    As for nitrogen, it has 10 electrons; the Lewis dot structure is :N:::N:

  • Chemistry.. -

    So for N2, it would be like this?
    Step1: 5*2=10 valence electrons
    Step2: 8*2=16 electrons total
    Step3: 16-10=6 electrons
    Step4: 6/2= 3 bond pairs
    Step5: 10-6=4/2=2 lone pairs
    I am confident that this is correct! Please check.

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