Chemistry!!March 7 & 8, 2013Ms. Boon

Catalyst What are the three

types of radiation?

Nuclear power plants use (fusion/fission) to generate energy and the sun uses (fusion/fission) to generate energy.

Take out your HW!

Objective: I can write a nuclear reaction equation.

Agenda: Catalyst Nuclear Subs Nuclear reaction

equations Exit Slip: Nuclear

Chem.

Spotlight: Nuclear SubmarineVideo Focus Questions:1. What is the mission of the US nuclear

submarines?2. What type of nuclear reaction powers the

sub? How does this work?3. Why does the Navy use nuclear subs rather

than diesel fuel powered subs?

Video: movies file – nuclear submarine

Notes: The nuclear strong force The nuclear strong force holds protons and

neutrons in stable nuclei together. This force is stronger than chemical bonds. Breaking or changing the nuclei during fission

or fusion reactions releases some of the nuclear strong force energy.

Example: fission of 1 g of uranium-235 generates as much energy as the combustion of 2700 kg of coal.

Notes: The nuclear strong force Example: fission of 1 g of uranium-235

generates as much energy as the combustion of 2700 kg of coal.

How much energy? The energy released in a nuclear reaction is

calculated usingE=mc2

E is energy (J)

m is mass (kg)

C is the speed of light 3.00 x 108 m/s

Using this equation, converting 1.0 g of a substance into energy produces over 1010 KJ of heat energy.

Quick Check: Which takes the most energy to occur: 1. physical, 2. chemical or 3. nuclear change

Quick Check: What part of the atom is involved in

nuclear reactions?1. The nucleus2. The electron cloud

How To Write a Nuclide Symbol:

Mass number = protons + neutrons

Think, Pair, Share: How many neutrons does this nuclide have?

How To Write a Nuclide Symbol:

Compare the nuclide symbol to the periodic table symbol.

Practice: Complete “B” Practice Writing Nuclides on your worksheet.

Radioactive decay equations:1. Alpha (α) decay: The mass number decreases

by 4 and the atomic number decreases by 2.

218 4 Po He +

84 2

214 Pb 82

Radioactive decay equations:2. Beta (β) decay: The mass number remains

the same. The atomic number increases by 1.

14 0 C e +

6 -1

14 N 7

Radioactive decay equations:3. Gamma (γ): Gamma rays are released

during electron capture.

51 0 Cr + e

+ γ 24 -1

51 V 23

Homework Review Read p. 642-643, 648-653 practice p. 653 #1-4

218 4 Po He +

84 2

214 Pb 82

22 0 Na + e 11 -1

22 Ne 10

142 142 Pm +

Nd 61

60

0 e -1

253 4 1 Es + He n + 99 2 0

256 Md 101

Practice Complete the Practice Worksheets. Raise your hand to check your answers and get a

stamp when you are done.

If you finish early: Do HW due today: 653 #1-4; Work on make up assignments,

your study guide, challenge questions, or homework.

Tonight’s HW: Nuclear Chemistry: Read Ch. 18 Section 2 (p. 648-657). Do

problems p. 657 #1, 2, 5, 6 Benchmark #3 Review - acids and bases: Re-read Ch. 15

Section 1 (p. 530-538) Do problems p. 566 #1, 2, 8, 9, 10; p. 567 #25, 26, 36

Exit Slip: Nuclear Chemistry

1. What part of an atom is involved in nuclear reactions?

2. What are the three types of radioactive particles/waves?

3. What is the difference between fission and fusion?

4. Which produces more energy per gram of fuel: a nuclear reaction or a combustion (chemical) reaction?

5. Write the nuclear equation for the alpha decay of uranium-238.

Homework Nuclear Chemistry: Read Ch. 18 Section 2 (p.

648-657). Do problems p. 657 #1, 2, 5, 6

Benchmark #3 Review - acids and bases: Re-read Ch. 15 Section 1 (p. 530-538) Do problems p. 566 #1, 2, 8, 9, 10; p. 567 #25, 26, 36

Announcements Grades:

Pinnacle grades are up to date except for the Reaction rates/Equilibrium worksheets and the short answer portion of the exam.

All make up work is graded and entered in pinnacle Make up work:

To get your work in before the 10 week grading period, the last day to turn in make up work is Friday March 15.

Tutoring: Tutoring is Friday at 3:45.

BM 3 study guide: Bring a folder to our next class to collect your

worksheets, old exams, and study guide.