Oh my word!

The unit test for chemical bonds was not as difficult as I expected because many of the questions on the test were similar to ones I studied on the practice quizzes on Schoology. I was (un)pleasantly surprised when Frankenberg revealed to us that there were 46 questions on the test. I was planning on there being less, but I didn't have much time to dwell on this because I had to get the test started! Even with so many questions, I was able to finish all of them and be fairly confident in 80% of my answers, which is above average for chemistry tests! I hope I will score as well as I felt after the test, and if not, I will not be too upset about it because this was a particularly challenging unit for me!

Hybridization, Lewis Structure, and Chemical Bonds Study Links

I used these study links to prepare for the test! Studying for the test was more stressful than usual because we didn't have a mid-unit quiz, so I did not know what to expect. Also, we had less time to digest the information this unit because of spring break coming up so soon.

Sigma and Pi Bonds, Hybridization Video

Crash Course Chemistry Lewis Structure Video

Tyler DeWitt Molecular Geometry Video

More Study Links:

Hybridization

Polarity Explanation

Molecular Geometry

Chemical Bonding Fun

This new unit, Chemical Bonding, is all about how atoms and molecules act when in chemical bonds. We have mostly been looking at covalent bonds this unit, and how to draw these molecules in different structures such as Lewis structures and 3-D geometry structures.

Ionic Bonds:

• Composed of a metal and nonmetal bonded to one another
• One atom in the resulting molecule has "stolen" the other atoms electrons

Covalent Bonds:

• Two nonmetals bonded together
• Share electrons

Lewis Structures:

• These structures show where the valence electrons are located on the molecule
• On this structure, since the F atoms need to have 8 electrons on their outermost valence shell to be stable, we added three non-bonding pairs of electrons (6 electrons) to the F valence shell.
• A correct Lewis structure always shows the correct number of bonds and non-bonding pairs of electrons on each atom

3-D Structure:

• 3-D has the same structure as Lewis structure, but instead we use a solid line and a dashed line to show that the molecule is 3 dimensional
• These different lines help show the three dimensions on a two dimension scale