Tuesday, November 10, 2009

Lecture #20, Monday, November 9th

I started lecture with a quick review of Lewis dot notations and talked about ionic and covalent bonding into more detail. I discussed how the forces holding atoms together in these bonds and transitioned into homogeneous diatomic molecules. I put an emphasis on the shared bonding pairs of electrons in these molecules vs. their lone pairs.

Single vs. Double vs. Triple bonds were mentioned and I discussed the relative strength of each of these bonds. We then discussed heterogeneous diatomic molecules and used the periodic trend of electronegativity to determine if a bonding pair of electrons is shared equally. If the bonding pair of electrons is shared equally then we refer to a bond as non-polar. If the electrons are shared unequally the bond is polar.

There is no class on Wednesday :(

On Friday we will start our discussions on drawing Lewis Structures.

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