Due: Friday, April 23, Rollins 1009, 5 p.m.

Homework 10

Reading:

Cutnell and Johnson, Chapters 29, 30 (except sections 7,9,10), 31 (through 31.7).

Problems for Review:

Reviewing these problems gives you good exposure to this week's main topics, in practice. All are worked in the Student Study Guide [SSG] or Student Solutions Manual [SSM]; solutions are posted on our website http://www.physics.emory.edu/Classes/142-003.html , for those without these texts.

Conceptual:

MCAT review problem, [SSG] p 581.

Quantitative:

Chapter 29, problems 5, 29, 33.
Chapter 30, problems 13, 19, 49, 25, 33.
Chapter 31, problems 1, 17, 21, 45, 53.

Problems to Hand In:

Conceptual:

Questions 1 through 7 refer to the following situation:

$\parbox{1.8in}{The figure shows an energy level diagram for a certai... ...ctron atom (or ion). Several transitions are shown and are labeled by letters.}$

1. Using the Bohr model, which atom or ion does this energy level diagram describe?
   1. ${}_1^1H$
   2. ${}_2^4He$+
   3. ${}_3^7Li$++
   4. ${}_4^9Be$+++
   5. ${}_5^{11}B$++++

2. What is the energy of the $n=3$ energy level?
   1. -54.4 eV
   2. -18.1 eV
   3. -13.6 eV
   4. -6.0 eV
   5. -1.5 eV

3. What is the ionization energy?
   1. 54.4 eV
   2. 18.1 eV
   3. 13.6 eV
   4. 6.0 eV
   5. 1.5 eV

4. Which transition involves emission or absorption of the photon with the longest wavelength?
   1. A
   2. B
   3. C
   4. D
   5. E

5. What is the energy of the photon involved in transition E?
   1. 6.0 eV
   2. 7.6 eV
   3. 13.6 eV
   4. 40.8 eV
   5. 48.4 eV

6. What is the momentum of the photon involved in transition A?
   1. $1.9 \ \times\ 10^{-7} \ {\rm kg m/s}$
   2. $1.4 \ \times\ 10^{-7} \ {\rm kg m/s}$
   3. $4.5 \ \times\ 10^{-8} \ {\rm kg m/s}$
   4. $2.9\ \times\ 10^{-26} \ {\rm kg m/s}$
   5. $2.2\ \times\ 10^{-26} \ {\rm kg m/s}$

7. Which of the transitions shown correspond to emission of a photon?
   1. A only
   2. A and B only
   3. C, D, and E only
   4. A and D only
   5. D and E only

Quantitative:

Chapter 29, problems 6, 30, 34.
Chapter 30, problems 22, 52.
Chapter 31, problems 11, 19, 34.