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Unit 9: Radioactivity and Nuclear Energy

Unit 9 is on the topic of nuclear radition and nuclear energy. We will learn what nuclear radiation is and how it is used for both bad and good purposes. It will be a shortened due to the end of the school year. The actual schedule for the remaining days is listed below on this page. There will be a couple of readings and 1 or 2 other WebAssigns.

There will be a quiz on this topic on Thursday, June 1. Keep a good packet and you will have an effective study tool for that quiz. It will be the last score of the quarter.

Final Exam

Information about the Final Exam will be available soon. It will be only mildly cummulative. That is to say that content learned first semester will be on the Final Exam. However, it is the first semester content that was repeated during second semester or incredibly important that will find its way into the Final Exam. Most questions will be based on second semester content.

How It All Ends

Here's how the year will end … in case you're wondering … or planning … or plotting.

Wednesday, May 17
Discuss Unit 8 Test;  mostly Titration Project     (Last day with chemicals in the room.)
HW: Prep for Test

Friday, May 19
Start Nuclear Unit (pp. 1-4);  Unit 8 Test
: Poster Presentation

Tuesday, May 23
Nuclear Unit (pp. 1-4);  work on Poster Presentation (50 minutes)
: Poster Presentation  and WebAssign (Reading)

Thursday, May 25   
(Shortened Periods) Discuss Decay series (p. 5), Nuclear Bombardment (p. 6), Half Life (pp. 11-12);  Half life and Radioactive Decay (pp. 13-14)
HW: WebAssigns

Tuesday, May 30
Half Life and Radioactive Decay (pp. 13-14) ; Nuclear Unit: Nuclear Energy (pp. 15-16); ∆E=mc2 (p. 9)
HW:  None

Thursday, June 1
Discuss Final Exam/Review; Discuss Stellar Nucleosynthesis (pp. 7-8); Closing Comments; Unit 9 Quiz

Mr. H's Little Secret

Pssss.  Hey bud! I have a secret to share. Now that you know how to calculate the molar mass, here's a little cheat you should be permitted to use. It's called the Molar Mass Calculator and you will find it by following the links. You type in the formula and it calculates the molar mass. (Revised links on 2/28/17)

Molar Mass Calculator ... 2 decimal places

Chemical Molar Mass Calculators ... several decimal places ... a bit buggy?

    Online Homework


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Today in Class

>> Thursday, May 25 <<

Focus Question(s):
  • How about that Maker Fair?
  • What is a radioactive decay series?
  • What is nuclear bombardment and how can the nuclear change be represented as a balanced nuclear equation?
  • What is the meaning of half-life and how can the concept be used to relate age and the amount of a radioactive sample remaining?


Shortened Periods - Honors and Awards Assembly

Block 3: 1:03 PM to 2:06 PM
Block 4: 2:12 PM ==> 3:15 PM
  • Discuss decay: p. 4, Q#6-7 and Check pp. 1-2
  • Discuss Radioactive Decay Series (p. 5)
  • Discuss Nuclear Bombardment (p. 6, selected Qs)
  • Discuss Maker Fair Project
  • Clean up lab drawers
  • Discuss Half Life Reading Guide (pp. 11-12)
  • Half life and Radioactive Decay (pp. 13-14)



  • Coming Soon

Next Time in Class

>> Tuesday, May 30 <<

We will review half life and half life mathematics. We will spend some time discussing binding energy and nuclear stability. We may have some time to discuss stellar evolution and nucleosynthesis.

Periodic Tables

Are you in need of a periodic table?  Try one of the following websites:

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