Hon Chemistry 3-1-21 Applications of Radioactivity, Pt. 2 and Fission & Fusion

HON CHEMISTRY: Hey guys! Here’s the laaaaast of the chapter. I found an old vodcast that combined the notes from Friday and today and have posted it below for your review. How are you studying? Be careful and don’t take the test for granted! And donโ€™t forget to check out the the Chapter 21 Stuff to Know & sheet.

Make sure you keep practicing 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!

FYI – This is a pic of a test used to check on blood flow through the heart during a stress test. Fun, huh!?

So what’s this about you probably having an radioactive isotope in your house?!? Don’t forget to research how smoke detectors, especially those with Americium, work!


Image source http://www.cedars-sinai.edu

Hon Chemistry Half-Life Simulation Lab

HON CHEMISTRY: Hey guys – this is where honors chemistry will post results for the Half-Life Simulation lab. You’ll just list your data from the first data table as a comment – just like you comment every week, except this time you are just listing the data from the first data table.

Remember, you don’t have to use candies; you may use coins or anything else that has two sides. Please note that you are to post the number of “radioactive” nuclides remaining after each toss.

Just to clarify, everything on the lab sheets will go in your lab report on that you will submit as a PDF to Google Drive and TurnItIn.com – Title, Objective, Procedure, Observations (with data table), Conclusion, and Questions. Don’t forget that your graph needs to be either a full page graph that you do on Excel or a similar program, or you can draw a full page graph on graph paper, scan a very clean, sharp copy and copy it into your lab report. And don’t forget that the analysis questions, calculations, graph, etc., go after your conclusion.

Happy counting – and wait until AFTER the lab to snack!! ๐Ÿ™‚

M&M's
flickr photo by Jared Browarnik

Hon Chemistry 2-24-21 Half Life

HON CHEMISTRY: So what do you figure is the half-life of a banana? But I digress…. Here’s the lecture for Wednesday on half-life problems.

Have fun with the half-life simulation lab! Be sure and post your data in the Half Life Lab web post by the time listed on the syllabus. Don’t forget to include pics and your graph! The lab report is to be submitted as a PDF 2X by the due date listed on the syllabus. ๐Ÿ™‚


flickr photo by Caro Wallis

Hon Chemistry 2-23-21 Properties of Radioactive Isotopes & Radioactive Decay

HON CHEMISTRY: Can you guess what it is?/ It’s a picture of uranium ore under UV light. Cool, huh! Here’s the lecture for Tuesday on the properties of radioactive nuclides and the types of radioactive decay.

How’d you like writing writing nuclear equations to represent radioactive decay? Maybe a tad bit easier than writing chemical equations? Don’t forget to memorize the nuclear symbols for alpha particles, beta particles (electrons), positrons, neutrons, and protons. Not nearly as bad as polyatomic ions?!?

Hon Chemistry 2-19-21 Intro to Radioactivity

HON CHEMISTRY: Happy Friday! 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!

Hon Chemistry 2-18-21 Isotopes & Average Atomic Mass

HON CHEMISTRY: Here’s the lesson for Thursday! 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! ๐Ÿ™‚ )


Image source IBM Almaden Research Center

Hon Chemistry 2-17-21 Structure of the Atom

HON CHEMISTRY: Happy snow week! Here’s the lesson for Wednesday! As you watch and take notes, 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?


flickr photo by Here’s Kate

Hon Chemistry 2-9-21 and 2-12-21 Intro to Atomic Theory

HON CHEMISTRY: For such a short lesson, it sure did take us a while to finish! Here’s the last of our discussion of modern atomic theory vs. Dalton’s atomic theory – well, actually a vodcast that has everything in one place. Your homework is only the homework that goes with this lesson. When we get back to school, we’ll do the Activity: Model of an Atom.

So how do you feel about being made from earth, air, water, and fire? 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?