Lewis Dot Diagrams

Here is some additional review material for Lewis Dot Diagrams.  With break coming so soon, I know some review help will probably be in order for January, and now you're ready to go!

Electron Dot Structures (aka Lewis Dot Diagrams)

Also, here are some good images:

Atoms and Compounds:

Polyatomic Ions:
Nitrate and Carbonate (remember: each one has a negative charge (CO3 -2 and NO3 -1)...it's just not written in)

Sulfate:    Ammonium:



Review Material for Next Test

Reminder: Your next test is coming at the beginning of next week!  It will cover the material we have  talked about from Chapter 13.  Here are the test dates:

1st hour: Monday 12/12
5th hour: Tuesday 12/13

Here are the topics we have covered, and a few resources to help you study!

• Electron Orbital Diagrams
• Electron Configuration
• History of atom models and scientists’ contributions to our understanding of the atom: Democritus to Schrodinger
• The 3 Rules for filling orbital diagrams
• Orbital shapes
• Noble Gas Configuration
• Quantum Numbers
• Creation of electromagnetic radiation (light and “invisible light”)
• Vocabulary: quantum, atomic orbitals, energy levels, quantum mechanical model, sublevels, atomic emission spectra

Resources:

http://www.chemguide.co.uk/atoms/properties/atomorbs.html (shapes of orbitals, electron orbital diagrams)

http://www.brazosport.edu/sites/CurrentStudents/Faculty/JudyChu/Tutorials/elecconf3.htm (writing electron configuration, filling electron orbital diagrams, the 3 rules of filling)

http://chemistry.bd.psu.edu/jircitano/periodic4.html (atomic emission spectra of elements)

Answer Key: ChemQuest! Packet

Here is the answer key for the packet on types of chemical reactions.  It would be useful to go over the equations for predicting products and reactants because that's a skill you'll need for the test!

Chemquest! Chemical Reactions

Test Dates:
1st Hour--Thursday 11/17
5th Hour: Friday 11/18

Types of Reactions

This week we are dealing with types of reactions.  There are five main categories:

1. Combustion
2. Synthesis
3. Decomposition
4. Single Replacement
5. Double Replacement

It's really fairly easy to categorize the reactions we see in class into one of these 5 categories, but if you want to see a good animation to help you get up to speed, I suggest watching this short You Tube video:

Five Major Chemical Reactions

What we do with these categories is what you will most likely find difficult.  We're going to take what we know about the categories and use it to predict what products will form in a reaction!  You all are starting to think like real chemists now...before chemists even think about mixing any chemicals together, they always use what they know about the reactants to predict what they will be making.  A mistake at this step could be really dangerous!

Chapter 8

Up next: Chapter 8

We're going to be looking at: chemical equations, balancing, types of chemical reactions, and predicting the products of reactions.  The best way to do this is by PRACTICE!  Some of you are good at balancing equations, but if you need extra help, try this activity:

Balancing Equations Tutorial: ChemBalancer

Again, nothing for a grade or that I can see, but it might be useful to you!

Upcoming Test!

Just a reminder that in the middle of next week, you will have your 2nd test of the year!  It's going to cover all of the naming we have done in this unit, but don't fret:  you get to use your periodic tables.

Your periodic table is like a cheat sheet for this test.  All of the following will be useful:

• Charges at the top of the representative element families
• Knowing what section contains the transition metals (hint: that tells you that you need to use roman numerals!), and where to find metals/nonmetals (so you know if you have an ionic compound...metal-nonmetal...or a molecular compound...nonmetal-nonmetal)
• The big list of polyatomic ions on the back side (know how to use them!)
• The small box of prefixes at the bottom of the front side (hint: only use them for molecular compounds!  nonmetal-nonmetal)

Chemistry Nomenclature

A little confused about naming?  Here's some additional help:

Naming Binary Ionic Compounds (see part I)
Naming Binary Compounds with Polyatomic Ions
Naming Binary Molecular Compounds (see the 1st part)

Even though it may not be exciting, the best way to study this is to do a lot of practice problems.  This is why you have the 4 page packet of problems...by the end you should be a master of naming!