Chemistry 11-28-17 Percent Composition

CHEMISTRY: Great job today… a little bit different lab procedure, huh?!! This lab is answered only on notebook paper – be careful to show correct data and calculations!

BTW – I think you’ll find that percent composition problems are really easy to catch on to. Make sure, though, you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those chemical names for common substances so that you’ll have something to find the percent composition of!

flickr photo by Τϊζζ¥

Hon Chemistry 11-27-17 Structure of the Atom

HON CHEMISTRY: Were you able to follow the connections the scientists made as they discovered the structure of the atom? Here’s the lecture from today. 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.

Don’t forget about the video clip we watched in class – and I’ve included a couple extra ones. 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 – how do you feel about playing scientist last week? How is what you did similar to the work of early scientists in discovering the structure of the atom?

flickr photo by Here’s Kate

Chemistry 11-27-17 Mass-Moles-Molecules Review

CHEMISTRY: So how many molecules are in one drop of water? Good job figuring that out today!

You’ve got some great tools to use – be sure you know what to use and when to use it. Best way to learn that? Practice, practice, practice!!

Photo by zhang kaiyv on Unsplash

Physics 11-27-17 Intro to Work & Energy

PHYSICS: Funny thing about words, all this work you thought you’d been doing, was it work after all?

Great intro to chapter 5! I think you’ll do great with the work problems, just remember everything from the last chapter and multiply by d!

flickr photo by *hb19

Chemistry 11-16-17 Formula Mass & Molar Mass & Molecules

CHEMISTRY: So how many water molecules do you think are in this drop? Now you have enough information to find out. Can you figure it?

Here’s the lecture from Thursday on formula mass and molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You’ve got a couple of great tools – so now think through the problems and go forth and conquer!! Be sure and practice them so you don’t forget!

Chemistry 11-14-16 Formula Mass & Molar Mass & Molecules from Tammy Skinner on Vimeo.

flickr photo by ecstaticist

Hon Chemistry 11-15-17 Intro to Atomic Theory

HON 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?

And how did you do with your comparison of Dalton’s Atomic Theory with the Modern Atomic Theory? Could you discuss it in more detail at a later date??

Chemistry 11-14 and 15-17 Moles, Mass, Atoms & Avogadro

CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? 🙂

Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Wednesday on moles, mass, and Avogadro’s number. Below that is our look at a couple of the homework problems with moles. I still say he has a cool name…

flickr photo by Thomas Hawk

Hon Chemistry 11-14-17 Chapter 7 Test Overview

HONORS CHEMISTRY: God bless you as you study for the test! Here’s our overview of the test from today. Also, right below today’s lesson, I’m posting a vodcast from a help session last year – writing and naming chemical formulas- just in case you might feel the need for another look…

Have you been using the “Chapter 7 Stuff to Know & Know How to Do” sheet? It’s a great way to get organized in studying for the test. I know it seems like a lot, but you can do it!

First priority – make sure that you have memorized EVERYTHING. Then, go to and make sure you can write and name chemical formulas. Practice, practice, practice!!! Then start practicing the different kinds of problems – do at least three of each one of them. And also try those on That’s always some good practice. God bless – I’ll be praying for you!

Photo by Alexandre Chambon on Unsplash

Hon Chemistry 11-11-16 Chemical Formulas Help Session

Hon Chemistry 11-11-16 Help Session from Tammy Skinner on Vimeo.

Chemistry 11-10-17 Oxidation Numbers

CHEMISTRY: One man’s rust is another student’s lesson in chemistry! Great job today with oxidation numbers. Now it’s time to go and practice applying them! Need help? Decide on a time for the help session and let me know! 🙂

How did you do on the mock pre-test? Are you ready for the REAL pre-test TUESDAY? For the pre-test you need to have memorized (and be able to use!!): polyatomic ions, monatomic ions (but you can get these off the periodic table), acids, prefixes, the chemical names and formulas of common substances, and how to apply the oxidation rules to write and name chemical formulas.

That’s a lot, but you can do it! And make double dog sure you are working hard at memorizing it all now!!

flickr photo by scottwillis

PHYSICS 11-10-17 Forces with Pulleys and Friction

PHYSICS: Here’s a different take on forces – an application of horizontal forces, vertical forces, friction, all at once! Wow! Great job on solving the problem – can you now go see if you can solve it by yourself?

Thanks, Matthew, for the visual of almost weightlessness! 🙂