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May 30, 2015

Homework Help: Chemistry

Posted by Mary on Monday, April 26, 2010 at 10:59pm.

Consider the Lewis structure for the major resonance form of PCS–. (Note that carbon is the central atom.) The structure shows:

a. A phosphorus-carbon triple bond and a carbon-sulfur single bond.
b. A phosphorus-carbon double bond and a carbon-sulfur double bond
c. A phosphorus-carbon single bond and a carbon-sulfur triple bond.
d. A phosphorus-carbon single bond and a carbon-sulfur double bond.
e. A phosphorus-carbon single bond and a carbon-sulfur single bond

I'm just mostly confused on doing lewis structures. I get the basic idea, but I'm confused on how you know to do single bonds/double bonds. Or how to know when a bond is polar. Also, when a molecule is polar.

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