Today we looked at how hybrid atomic orbitals can be used to understand the shapes and angles predicted by VSEPR. We used this idea of adding and subtracting orbitals to look at molecules and took an initial look at some molecular orbital diagrams for "simple" diatomics.
There is a new Mastering Chemistry assignment posted, due Thursday. This is the last MC assignment for the semester.
For those of you who will be continuing on in Chem 210, keep your book! We will be using the same book in Chem 210. If you are continuing in my class, you will also continue to use Mastering Chemistry. You should be able to continue using the same MC account, they're valid for at least a year (maybe 18 months?). If you are moving over to Dr. Edvenson's class, I don't know if you will be using MC.
7. Which of the following atoms is the smallest?
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b. Li
c. Cu
d. Ca
e. P
8. Which of the following ions is the smallest?
a. Be2+
b. C4+
c. Al3+
The easiest way to approach these questions is probably to look at the electron configurations of each item listed. In general, more shells leads to a larger atom or ion. You also have to look at the magnitude of the posititve charge in each nucleus and relate it to the number of electrons and what shells/subshells contain those electrons.
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