Lewis Structure Lab

We did a lab where we went into the library to work out lewis structures on white board tables. We had to find the structure, shape, polarity, bonding and non bonding pairs, hybridization, and VSEPR formula for different molecules. Some of the molecules included BeH2 and PCl5.

Polar Bonds

In this lesson, we learned about polarity and the different kinds of bonds. In order for a molecule to be polar, the bonds must be polar which means that the electranegativity needs to be be more on one side of the bond than the other. This section was a little confusing for me, so why not post more links.

Here

Here

Resonance

In this lesson, we learned about structure and resonance. In a nutshell, resonance is when a lewis structure can be drawn in multiple different ways for the same molecule. The shape change is displayed by a double headed arrow between the two structures.

We also checked out the shapes of molecules. When there is a structure with no non-bonding pairs, we have 5 different regions the structure can be. Depending on the number of bonds, it can be linear, trigonal planar, tetrahedral, trigonal bipyramid, and octahedral. If there are non-bonding pairs, the shape can be a asymmetrical form which will also be polar.

For more info check out this link here. Also check the one out under the photo.

http://socratic.org/questions/what-is-a-resonance-hybrid

Lewis Formulas

We started our new unit about chemical bonding. Its mostly about the relationships between electrons. Our lesson was about lewis formulas which is used to display chemical structure of molecules. There is a certain equation you use taking the sum of the electrons you have and what you need to find the amount of bonds in the structure. We also learned about bonding and non-bonding electrons. For some more info, check out this link here. Also check out the link under the photo.

http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/lewis.html