CHEMISTRY: Can you believe atoms are that small – and the nucleus even waaaaaay smaller! The thumbnail is another picture of atoms from the IBM Almaden Research Center. These are iron atoms on top of copper. Being able to move atoms around like this was a giant leap in the field of nanotechnology! (Sorry about that, bad pun! )
Here’s the lecture from Thursday on atomic number and isotopes. It’s the last lecture for this chapter – and for this year!!
How are you doing on writing nuclear symbols? Also make sure you can use them to determine the number of protons, neutrons, electrons, etc., AND be sure you can use the formula to find average atomic mass!Happy calculating on the problems for tonight.
Oh, any questions about the Carbon Isotope Mini-Project?
CHEMISTRY: Isn’t God awesome to give us minds to understand the world around us – even the parts we can’t see!
Here are the last of the notes of how scientists discovered the parts of an atom. Make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. By the way, don’t forget about the video clips that I want you to watch! Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for the video clips that I want you to watch on The Discovery of the Electron and The Discovery of the Nucleus. All of these will be great tools in studying for the test!
PHYSICS – How are you doing on the conservation of energy/work problems? Here’s a couple of the problems that we did at the help session this morning. One from the Work/Energy worksheet and the other one, #46 from the book.
HON CHEMISTRY: Happy Test Day tomorrow!! Here’s the overview that we did on tomorrow’s test. Be careful and don’t take the test for granted! It will cover the beginning part of chapter 3 (through average atomic mass), chapter 21, and you will also have a set of chemical formulas to write and name. For more specific written details, check out the post on November 26, and also the Chapter 3 & Chapter 21 Stuff to Know sheets on Edline.
How’s your own “stuff to know & know how to do” list coming? You should be making one of those for each test now!
Could you use some extra practice? Help session tomorrow morning – 7:15ish A.M. And finally, practice everything! And did I mention, PRACTICE!! I’ll be praying for you!
PHYSICS: Wow! Do you realize what we just did? We finished the chapter! Well, we’ll add this small lecture on simple machines from chapter 7 to the chapter 5 test – but we’re done! Did you remember this stuff on simple machines from your physical science days?
I don’t think you’ll have any trouble with efficiency and mechanical advantage problems. How do you think the efficiencies of machines compare? Could you design a method to test that? You don’t need no stinkin’ lab sheets! Do you?
CHEMISTRY – Chocolate chip cookie dough model of the atom? Here’s the lecture from Tuesday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway. FYI – as we go on, make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. Wow, that’s a mouthful!
Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for the video clips that I want you to watch on The Discovery of the Electron and The Discovery of the Nucleus. All of these will be great tools in studying for the test!
Change in plans! We’ll finish notes tomorrow and move the Model of the Atom activity to next Tuesday, the day after the test. Help session? What about Friday?
PHYSICS: Great job on the horsepower lab. Lotta noise – I’m thinking some of you took out some of your physics phrustrations on the stairs! Post your own horsepower numbers here. Did you notice that not all of the stairs are the same height? Post your lab results here. Who has the most power? And why?
Here’s the super short lecture from today on power. Now go forth and conquer the power problems!
HON CHEMISTRY: Radioactive isotopes all around! Did you ever dream there were so many applications of radioactivity? This is a pic of a test used to check on blood flow through the heart during a stress test. Fun, huh!?
Great job finishing the chapter! And thanks for being patient with the recordings! Here are the two vodcasts that will wrap up the rest of the notes – the first is on the second part of the discussion on uses of radioactive isotopes, the second is from the discussion on fission and fusion.
How are you doing on studying for the test? It will cover the beginning part of chapter 3 (through average atomic mass), chapter 21, and you will most probably also have a set of chemical formulas to write and name.
For chapter 3, check out the Chapter 3a Stuff to Know & Study Suggestions sheet.
For chapter 21, make sure you practice half-life problems and nuclear equations. Also, make sure you’ve memorize the nuclear symbols for alpha particles, beta particles, positrons, neutrons, and protons. And then there are tons of notes on the conceptual stuff. Properties of radioactivity, people, types of radioactive decay, applications of radioactivity, definitions, definitions, and definitions!
Fission and fusion…
CHEMISTRY: So how do you feel about being made from earth, air, water, and fire? Here’s the very short intro we did on how we ended up with the atomic theory. Had you ever heard of Lavosier, Proust, and Dalton? We’ll continue with Dalton when we get back!
HON CHEMISTRY: Wow! Did you realize radiation was everywhere? It turns out there are some pretty useful applications of radioactivity! Let’s finish talking about that, as well as fission and fusion tomorrow.