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Math Help - Why is this polar?

  1. #1
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    Why is this polar?

    Explain why phosphorus trichloride is polar?

    Can anyone give me some info as to why this is true?

    Thanks
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  2. #2
    MHF Contributor Unknown008's Avatar
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    How many outermost electrons does Phosphorous have?

    How many of them are used in bonding?

    How many pairs of electrons are left, if any?

    If you know why ammonia is polar, you should be able to explain why phosphorous trichloride is polar.
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