Chemistry 4-6-21 Isotopes & Average Atomic Mass

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

Here’s the discussion for Tuesday on isotopes and average atomic mass. 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!

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

Hon Chemistry 4-7-21 Electron Configuration Homework & Practice

HON CHEMISTRY: Here’s the lesson for Wednesday. Today is a short review day for electron notations. Pay close attention to the period, block, group, type parts!

Have you checked out the Chapter 4 Stuff to Know Sheet? The test is right around the corner! Make sure you give yourself plenty of time to memorize the things you need to memorize so that you can apply them on the test. And practice, practice, practice, the problems and electron configurations. Did I mention that already?

Chemistry 4-6-21 Structure of the Atom

CHEMISTRY – Chocolate chip cookie dough model of the atom? That’s what Thompson thought the atom must look like! Here’s our discussion of how scientists began to determine the structure of the atom and the existence of subatomic particles. For each, 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!

As we continue the explore the discovery of the structure of the atom, here are some video clips that I want everyone to watch that will help make things a bit clearer. 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!


flickr photo by pixxiestails

Physics 4-6-21 Properties of Waves

PHYSICS: Here’s the vodcast on the properties of waves and the a link to the NASA video on wave motion for Tuesday. Do you remember anything from your earlier 8th grade physical science days? Problems are pretty simple for you, I think. Do you remember the main formula from chemistry? Speed = wavelength x frequency (c = λf).

Easy peasy – and don’t forget the applications!

Here’s the link to the NASA Launchpad video on wave motion – NASA Launchpad: Wave Motion. Since we’re not going to be able to play with slinkies today in person, this will be a good replacement!

Hon Chemistry 4-6-21 Blocks of the Periodic Table & Noble Gas Notation

HON CHEMISTRY: Here’s the lesson for Tuesday. Wow! You learned a lot today! Don’t we serve an awesome God?!? You probably knew the periodic table was really organized, but did you realize that it was THAT organized? Awesome!

Practice what you’ve learned!! You’ll get the hang of it and be as laid back as this “noble” fellow in no time! 😉


flickr photo by Rennett Stowe

Hon Chemistry 3-31-21 Orbital Notation & Electron Configuration Notation

HON CHEMISTRY: Wow, you did a great job today! Did quantum numbers begin making more sense when you started using them? Good work with orbital notation and electron configuration. I think you’re going to be seeing arrows and numbers in your sleep!

And then, just when you were getting the hang of drawing arrows, I go and change it! But don’t you think writing electron configuration notation is a whole lot shorter than doing orbital notation? Don’t get me wrong, knowing how to do orbital is great for seeing how the electrons are paired, but this way is waaaay shorter!

Be sure and practice with the homework tonight, and don’t forget to use the Aufbau “chart”! Did you figure out the riddle!


flickr photo by Iguana Jo

Chemistry 3-29-21 Intro to Atomic Theory

CHEMISTRY: Here’s the last of our discussion of Dalton’s atomic theory vs. the modern atomic theory. If you weren’t in class today, be sure and get the definitions and applications of allotropes and isotopes. I still say it’s pretty cool that something that was discovered so long ago is something that we use today!

Now on to checking out part of those theories! Today we did Part 1 of the Conservation of Mass lab. If you weren’t in class, you’ll need to make up Part 1 before we do Part 2 in class on Wednesday. You can make it up tomorrow, Tuesday, 5th or 7th periods, or you can come Wednesday morning before school at 7:50 A.M. It will take about 15 minutes. Be sure and read Part 1 of the lab so it will go faster!

Hon Chemistry 3-29-21 Quantum Numbers & Intro to Orbital Notation

HON CHEMISTRY: Great job with quantum numbers today! And then on to orbital notation! Wow, it was a lot. Confused yet?

Don’t worry! Today you learned all the background information about quantum numbers. Did it start to make more sense when we put it all together with orbital notation? Let’s take it up again tomorrow!


Cartoon courtesy of nearing-zero.net

Hon Chemistry 3-26-21 Bohr vs. Quantum Model of the Atom

HON CHEMISTRY: I figured anybody who ditched his honeymoon to finalize his work on atomic theory deserved to have his picture on our website.

Here are some of the video clip that begin to show the connection between our lab on spectroscopy, the hydrogen emission spectrum, and how we can identify elements – including the one from today on why it’s all important. They’ll be very helpful as you study!!

The Electromagnetic Spectrum (not the song!)
Emission Spectrum of Hydrogen
Animated Quantum Video is the one that explains all about why scientists began to believe that electrons could be acting as waves


Image source www.atomicarchive.com/Images/bio/B23.jpg