Hon Chemistry 2-14-24 Properties of Radioactive Isotopes

HON CHEMISTRY: So ordinarily it looks like just any old hunk of rock, but this is a picture of uranium ore under UV light. Pretty cool, huh?!? Here’s our beginning discussion of the unique properties of radioactive nuclides. And as a bonus, this vodcast has a head start at looking at nuclear equations. Woohoo!!

Hon Chemistry 2-13-24 Intro to Radioactivity

HON CHEMISTRY: Recognize this symbol?! Here’s the lesson for today. First, a look at some of the homework from last night, and then onward to chapter 21!

Speaking of – welcome to nuclear chemistry! No, really – I think you’ll be surprised how much nuclear chemistry is already a part of your everyday life. And now you know where E=mc2 came from!!

By the way, when you get a chance, read about the life of Marie Cure – fascinating woman of science with an incredible story!

Physics 2-12-24 Newton’s Law of Universal Gravitation

PHYSICS: Wait! There’s a fourth law? Yep – Newton’s law of universal gravitation! So when you jump off of something, the Earth moves, huh?

You’ve learned little g, now you know big G! Good job setting up the problems, also make sure you can apply the concepts.

Ready to escape? 🙂

Physics 2-10-16 Newton's Law of Universal Gravitation from Tammy Skinner on Vimeo.

Hon Chemistry 2-12-24 Isotopes & Average Atomic Mass

HON CHEMISTRY: Isn’t God awesome to give us minds to understand the world around us – even the parts we can’t see!

Today we talk about isotopes and calculating average atomic mass. Make sure you practice all the ways to write 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!

Here are some answers for tonight’s homework:

#19) 39.95 u
#20) 10.00 u
#34) 9 x 10^12 more dense

Can you believe atoms are that small – and the nucleus even waaaaaay smaller! The thumbnail is a 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! 🙂 )


Image source IBM Almaden Research Center

Chemistry 2-9-24 Chapter 8 Overview & Practice

CHEMISTRY: God bless you as you prepare for your quiz and test!! Here’s our overview of the quiz and test from today. After that is practice on completing and balancing equations from Worksheet 3 – and I added some extra practice from different classes.

Have you checked out the Ch 8 Test Stuff to Know sheet? Good stuff! Key to a good test results – memorize what you’re supposed to have memorized and PRACTICE EVERYTHING! You’ve got this!

Chemistry 2-8-24 Single and Double Replacement & Combustion Reactions

CHEMISTRY: You realize what we did? We finished all 17 types of reactions today! Have you been practicing using them?

Are you ready for the quiz tomorrow? Have you been working on memorizing all 17 types of reactions?! Just the 17 reactions will be on the quiz Monday, but what about the chapter test coming up? For that, don’t just memorize them, make sure you can apply them as well.

When you start to work any equation, first determine what type of reaction it is, then figure out what rule applies and follow it to determine the products. I believe in you! You can do it!! (and yes, I realize I am repeating myself, but I do and you can!)

Hon Chemistry 2-8-24 Structure of the Atom

HON CHEMISTRY: So how to you find something you can’t see? Here’s the lesson from Thursday. Be sure and follow the connections the scientists made as they discovered the structure of the atom. Do you think there could be anything smaller than protons, neutrons, and electrons? Hmmmmm……

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.

Here are some extra video clips to go with the lesson for today. They’ll help you review the different experiment that the guys like Thompson and Rutherford did. Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for a little history on The Discovery of the Electron. Here’s the other one on The Discovery of the Nucleus.

By the way – do you think you could do what they did – figure out what something’s made of without seeing it? Hmmmm….


flickr photo by Here’s Kate

Physics 2-8-24 Rotational Dynamics, Pt. 1

PHYSICS – Wow! Could you do this? Here’s the lecture on rotational inertia, angular velocity, and angular momentum – rotational dynamics! We’ll pick up the conservation of angular momentum tomorrow. Fun times!

By the way – I wonder how all this applies to other rotating things…like maybe the Earth? Hmmmmm……


Photo Credit: frozenhaddock via Compfight cc

Hon Chemistry 2-7-24 Intro to Atomic Theory

HON CHEMISTRY: So how do you feel about mixing chemistry and history? Here’s the intro we did on how we ended up with the atomic theory. Had you ever heard of Lavosier, Proust, and Dalton?

Pretty impressive little theory that Dalton came up with, huh? Were you surprised as you made comparisons with the Modern Atomic Theory? Could you now take it a step further and show connections between the three laws we discussed today and Dalton’s atomic theory?