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PHYS 1CPROBLEM SESSION

COURSE INSTRUCTOR: DR. FRANK WUERTHWEIN

We’ll start at 7:00

Week 10

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Tomorrow’s Quiz

• Ch.28 and Ch.29

• Create your own cheat sheet (letter-

sized, one-sided).

• Bring your own calculator.

• Practice old quizzes problems.

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Cheat sheet

Quiz #4: Letter-sized, and used only on one side.

Final Exam: Letter-sized, and can used on both sides.

Hydrogen AtomQuantum Numbers

• Given n, there are n2 (n, l, ml) states.

• 2 electrons (ms = 1/2, -1/2) can be

assigned to a single (n, l, ms) state.

• We can assign 2n2 electrons to all

states with quantum number n.4

n = 1, 2, 3, 4, 5 …

l = 0, 1, 2, … , n-1

ml = -l , -l+1, … , l-1, l

ms = 1/2, -1/2

Hydrogen Atom

Practice Quiz

Nuclei

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Ch29

Question 6

5

• (e)

Ch29

Question 9

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• (i) d (ii) c d (iii) b c

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Practice Quiz

Question

7

• (e)

Ch29

Question 1

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• (e)

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Hydrogen AtomEnergy Levels

• Electron goes from higher energy level

EH to lower energy level EL by emitting a

photon with energy Ephoton = EH-EL.

• Electron jumps from lower energy level

EL to higher energy level EH by

absorbing energy equal to EH-EL

• Ionization Energy.9

𝐸𝑛 = −𝑘𝑒𝑒

2

2𝑎0

1

𝑛2= −

13.6

𝑛2(eV)

Ch29

Question 3

10• (c)

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Ch29

Question 2

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• (a)

Practice Quiz

Question

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• (d)

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Practice Quiz

Question

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• (b)

Hydrogen AtomMagnitude of orbital angular momentum

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𝐿 = 𝑙(𝑙 + 1)ћ = 𝑙(𝑙 + 1)ℎ

2𝜋(J s)

Orbital angular momentum along z-axis

𝐿𝑧 = 𝑚𝑙ћ = 𝑚𝑙

ℎ

2𝜋(J s)

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Practice Quiz

Question

15

• (d)

Practice Quiz

Question

16

• (d)

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Practice Quiz QuestionsQuiz #4

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• Photoelectric effect

• Compton Scattering

• Blackbody radiation

• Uncertainty principle

• Wave function / Probability density

• Particle in a box

• Hydrogen Atom

Practice Quiz

Question

18

• (d)

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Practice Quiz

Question

19

• (d)

Practice Quiz

Question

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• (c)

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Practice Quiz

Question

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• (a)

Practice Quiz

Question

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• (d)

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Practice Quiz

Question

23• (a)

Practice Quiz

Question

24• (b)

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Practice Quiz

Question

25

• (a)

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Congratulations!!

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Bye Bye

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