• Unit 3 Test: 1
• Unit 3 Test: 2

Nice try.

In association with the shortened periods for Fall fest. I have adjusted the test so that it only has 45 questions worth 90 pts. total.

There will be calculations, but the test is entirely scantron (T/F, MC, & Matching).

Good Luck!

Our review game for today is the old school game show “Password”.  The same Powerpoint used in class will be available after school via the semester 1 Documents page for you to review with. My suggestion would be:

• If you’re by yourself, use the pages as flashcards and say what you know about each term out loud
• If you’re with other chem students, give each other clues in the same way the game is played.

It’s important to point out that although the game is fun and a good tool to review vocab, most of your test will be based on performing problems and calculations. Make sure you can complete the following:

1. When given an isotopic symbol, identify the number of Protons, Neutrons, & Electrons.
2. Correctly change the number of electrons in Cations and Anions.
3. Identify a common isotope using the atomic mass of an element, then rounding that number.
4. Calculate atomic mass using actual atomic masses & percent abundance of isotopes
5. Complete nuclear reactions (Alpha & Beta)
6. Complete a nuclear decay scheme
7. Identify particles by their symbol
8. Complete a half-life chart.

Use your study guide and the answers from the documents page. Watch the voice threads and go over notes to help you review.
Please contact me via email if you have questions tonight. Feel free to come see me before school for extra help as well.

Today we‘ll be finishing gathering our information on Nuclear Chemistry and begin working on our Unit 3 Study Guides. You’ll be receiving the study guide today (also available at the link below and on the Docs Page) in advance of your

UNIT 3 TEST FRIDAY!

 The Study Guide will be the second grade of the new 9 weeks, after we finish our Nuclear Decay activity on Tuesday. The test then will not only be the 3rd grade of the new quarter, but it will also be the first major grade of the new 9 weeks! The test will be 100pts. So, start prepping now. Review the Voicethreads, study the study guide, make not cards of the vocab, do whatever it takes… but start preparing now!

• Unit 3 Study Guide

Today we’ll be investigating the nucleus of the atom. I’m sure you know about the tradition powers… The proton, the neutron, & the electron. But, believe it or not, there’s more to the nucleus than meets the eye… Which is a weird statement since you can’t even see the nucleus, but I digress.
You’ll need

• The document “Nuclear Discovery Questions“
• Your iBook or textbook (Ch. 25)

Skim the chapter and fill in the questions with information from the chapter. I am not asking you to read the entire chapter. Instead, Find the section you need, and skim the information. Then go to the questions, fill in the info you remember, and then go back to the text to get specific answers.

Yes, “I HAS ANSER!”
The answers to the particle caluclations are avaialble on the documents page. Also, the Atomic Mass answers are available there as well.

Reminder! Do not Just copy! Do the work on your own, and check your answers. It is more important to me that you get the info right and you understand how to do the steps, than to have you just do “busy work”.

Two Hydrogen atoms walk into a bar.
One says, “Oh no! I lost my electron!”
The other says, “Are you sure?”
The first one says, “Yeah, I’m positive!”

Hahahaha... if you’re not sure why that’s funny, you need to skip over to the Semester 1 Notes page and view the voicethread from Unit 3 on Atomic Structure & Variations.

Today we’ll be covering the last topic of unit 2, Thermochemistry. Yes, it is exactly what it sounds like… Sort of. Thermochemistry may sound like its all about temperature, but really it’s more about the transfer of energy, specifically heat.
After today you will be able to calculate the amount energy (in the form of Calories or Joules) absorbed or lost when transferring energy, specifically heat. In order to do this, all you need to remember is a little song. Ahem…

“q” equals M-C-Delta t, M-C-Delta t. “q” equals M-C-Delta t, M-C-Delta t….

you get the point. The formula

q= m x C x /\t

is the formula for calculating transfer of energy.

• q is heat calculated in Joules or Calories
• m is the mass of the substance
• C is the specific heat (the amount of energy, in Joules or calories, it takes to raise the temperature of 1g of substance 1 degree Celsius) of the substance
• /\t is the change in temperature (t*final – t*initial)

The formula can be rearranged, like in math class, to get any of the variables alone to calculate one.

We’ll be starting some practice problems in class, then working on the rest tonight, and finishing up in class tomorrow before we start to review. The Answers can be found on the Semester 1 Docs Page.