Chapter 7 - ManyElectron Atoms
7-1: (a) Using Equations (7.4) and (6.41), the energy difference is
AE = 2,1,2 B = 2113 B = 2 (5.788 x 10-5 eV/T) (1.20 T) = 1.39 x 10-4 eV.
(b) The wavelength of the radiation that corrsponds to this energy is
_ 113 _ 1.240
Chapter 9 - Statistical Mechanics
9-1: As in Example 9.1, g (62) = 8 and g (61) = 1. Then,
0(62) = 1 2 4e- (62 60/1651" = 46361/4kT
n (61) 1000
Where 62 = 61/4. Using 61 = 13.6 eV, and solving for T,
T: (1) (3/4) (61) _ <3/4)(13.6eV) z ,4, X104 K.
Chapter 8 - Molecules
81: The nuclear charge of +26 is concentrated at the nucleus, while the
electron charges densities are spread out in (presumably) the 13 subshell. This
means that the additional attractive force of the two protons exceeds the mutual
Chapter 5 - Quantum Mechanics
5-1: Figure (b) is doublevalued, and is not a function at all, and cannot have
physical signicance. Figure (c) has a discontinuous derivative (a cusp) in the
shown interval. Figure (d) is not nite everywhere in the shown inte
Chapter 11 - Nuclear Structure
11-1: gLi: Z = 3 protons, A Z = 6 3 = 3 neutrons.
igNe: Z = 10 protons, A Z = 22 10 = 12 neutrons.
23 Zr: Z = 40 protons, A Z = 94 - 40 = 54 neutrons.
1:ng: Z = 72 protons, A Z =: 180 72 = 108 neutrons.
112: If a: is the fra
Chapter 10 - The Solid State
10-1: The halogenic atomic numbers are Z = 9 for ourine (F), Z = 17 for
chlorine (Cl), Z = 35 for bromine (Br) and Z = 53 for iodine (I). The greater the
atomic number of a halogen atom, the larger the atom is, hence the incre
Preface to the Instructor's Manual
For the sixth edition of Concepts of Modern Physics, most problem solutions have not changed substantially. Several considerations that have been made
reflect a further trend towards greater use of more sophisticated cal
Chapter 3 - Wave Properties of Particles
3-1: From Equation (3.1), any particles wavelength is determined by its
momentum, and hence particles with the same wavelength have the same momenta.
With a common momentum p, the photons energy is pc, and the part
Craig B. Watkins
Massachusetts Institute of Technology
Boston Burr Ridge, IL Dubuque, IA Madison, WI New York San Francisco St. Louis
Bangkok Bogota Caracas Lisbon London M
Chapter 6 Quantum Theory of the Hydrogen Atom
6-1: Whether in cartesian (x, y, z) or spherical coordinates, three quantities
are needed to describe the variation of the wave function throughout space. The
three quantum numbers needed to describe an atomic
Chapter 13 - Elementary Particles
131: (a) From the uncertainty principle, with AE = 2 mcz, the uncertainty
in the time that such an electronpositron pair may exist is
.2 1-16 -
A 71/2 _(658 x 0 eVs)
_ = 3.22 1022 .
_ 2mc2 4(0.511 x 106 eV) X S
Chapter 4 Atomic Structure
4-1: The fact that most particles pass through undeected means that there
is not much to deect these particles; most of the volume of an atom is empty space,
and gases and metals are overall electrically neutral.
4-2: An electro