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4.1a Structure of the Atom
Things you will need to know after today:
- modern atomic theory
- structure of the atom
- information contained in the periodic table
- how to draw Bohr models of the atom
Resources:
- Watch the youtube video: Crash Course in Chemistry #1
- Notes
- Textbook p168-175
Assignment:
- Workbook p60-61
- Worksheet (due next class)
| File | Description | File size |
|---|---|---|
 4.1.notes.atomic.theory.pdf | 429 kB |
4.2 Bohr Models of Ions and Compounds
The Bohr model is concerned more with the structure of a single atom rather than how that atom interacts with other atoms to form compounds. Simple compounds can be drawn using Bohr diagrams, but it's the electron configuration that is really important. There are different ways of drawing Bohr models depending on whether you have an ionic bond (between a metal and a non-metal) or a covalent bond (between 2 non-metals).
Things you should be able to do after today:
- determine the number of electrons in an ion
- draw a Bohr model of an ion
- draw a Bohr model of an ionic compound
- draw a Bohr model of a simple covalent compound
Resources:
- Notes
Assignment:
- Workbook p60-61
- Worksheet
| File | Description | File size |
|---|---|---|
| 4.2.bohr.diagrams.worksheet.pdf | Worksheet: Bohr Diagrams | 109 kB |
| 4.2.notes.compounds.pdf | 505 kB |
4.3 Lewis Diagrams
Bohr Diagrams are great for simple atoms, but once you start looking at how electrons are configured during chemical bonding, the Bohr Diagram starts to become cumbersome and messy. The Lewis diagram is a variation of the Bohr model that strips out anything that is not important to show chemical bonding. While it has a number of features that are similar, it is a much cleaner way to show interactions of atoms during bonding and emphasizes what happens to the valence electrons
Another advantage of Lewis diagrams over Bohr diagrams is that it can show what happens when there are more than one bonding pair between two atoms, and is great for explaining why atoms like Oxygen or Nitrogen can form diatomic molecues
Things you should be able to do after today:
- determine the number of protons and electrons in ions using information from the periodic table
- draw Lewis diagrams of ions
- draw Lewis diagrams of ionic compounds
- draw Lewis diagrams of covalent compounds
- identify how many lone pairs and bonding pairs are in covalent compounds
- identify which atoms form diatomic molecules and draw the Lewis Diagrams for them
Resources:
- Notes
Assignment:
- Worksheet (we'll go over the answers in class)
- p62-64 of your workbook
| File | Description | File size |
|---|---|---|
| 4.2c.worksheet.pdf | Lewis Diagrams Worksheet | 125 kB |
| 4.3.notes.lewis.pdf | Notes on Lewis Diagrams | 424 kB |
4.4a Naming Ionic Compounds
Resources
- workbook p65-67
- Notes
Assignment
- workbook p68-70
Things you should be able to do after today:
- write the name for an ionic compound
- write the name for an ionic compound where the metal is multivalent
- write the name for an ionic compound that includes a polyatomic ion
- write the formula for an ionic compound if given the name
- write the formula for an ionic compound that includes a polyatomic ion
Self Assessment:
- Challenge yourself with a partner. Take the quiz at: http://www.quia.com/quiz/1240133.html
- The shortened link is http://bit.ly/1S7A1C0
- Note: They refer to "common ion charge" as "oxidation number"
- These are harder and all involve polyatomic ions.
| File | Description | File size |
|---|---|---|
| 4.4a.notes.pdf | 685 kB |
4.4b Naming Covalent Compounds
There are different rules for naming covalent vs ionic compounds. One of the reasons is that molecules of ionic compounds interact differently from covalent compounds, and often can interact with each other in addition to how the ions interact within the molecule. The interactions can be quite complex and you will learn more about them if you take higher level chemistry courses.
If we are only naming the compounds, however, the naming process is quite basic.
Resources
- Notes
Things you should know after today:
- how to give the name of a covalent compound using the chemical formula
- write the chemical formula if you know the covalent compound's name
Assignment
- Workbook p71-72
| File | Description | File size |
|---|---|---|
| 4.4b.notes.pdf | 168 kB |
Balancing Chemical Equations
The Law of Conservation of Mass states that matter can not be created nor destroyed, and this is a fundamental rule that governs how products can form from reactants in a chemical equation. Today we will be writing some chemical equations and balancing the products and reactants to ensure that the Law of Conservation of Mass has been applied.
Resources:
- Textbook p202-211
- Workbook p74-76
- Notes
Assignment:
- Workbook p77-79 (answer key is attached so you can check your answers)
- Do the worksheet after you have finished the practice. Have Mr. Yang check your answers with you
- When you feel you are ready, take the "Balancing Equations" quiz
Things you should know after today:
- vocabulary: chemical reaction, reactants, products, word equation, skeleton equation, balanced equation
- create a skeleton equation from a word equatoin
- create a balanced equation from a skeleton equation by adding coefficients
Extra Practice:
- Do you want some extra practice balancing equations? Visit http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm
| File | Description | File size |
|---|---|---|
| 4.5.workbook.key.pdf | 665 kB | |
| 4.5b.notes.pdf | 238 kB |
Ch4 Review
Answers to the review questions are attached below
| File | Description | File size |
|---|---|---|
| 4.8.review.key.pdf | 466 kB |
Worksheet Answer Keys
Have you finished your assignments? Check your answers here to check your progress
| File | Description | File size |
|---|---|---|
| 4.4.workbook.key.pdf | 563 kB |