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32.1
32.2
Low
frequency
High
frequency
32.3
32.4
Constructive
interference
Destructive
D
t ti
interference
32.5
32.6
-- Questions -MULTIPLE CHOICE
CHOICE.
Choose the one alternative that
best completes the statement or
answers the question.
32.7
1) Compared to the wavelengths of visible light, the wavelengths of
matter waves are relatively
A) small.
small
B) large.
2)) When
h Rutherford
h f d had
h d a stream off alpha
l h particles
i l hit
hi a gold
ld foil,
f il most
of the particles
A)) bounced back.
B) stopped.
C) spiraled.
D) went almost straight through.
through
32.8
3) An excited hydrogen atom is capable of emitting radiation of
A) a single frequency.
B) many more than 3 frequencies.
frequencies
C) 3 frequencies.
4)) In the
h Bohr
h model
d l off hydrogen,
h d
discrete
di
radii
dii andd energy states result
l
when an electron circles the atom in an integral number of
A)) de Broglie
g wavelengths.
g
B) wave frequencies.
C) diffraction patterns.
D) none of these.
these
32.9
5) A uranium atom is 238 times as massive as a hydrogen atom. The
diameter of a uranium atom is the diameter of a hydrogen atom times
about
A) 10.
B) 100.
C)) 30.
D) 3.
E)) 238.
6) A beam of electrons has
A) particle properties.
properties
B) wave properties.
C) both of these.
D) neither
i h off these.
h
32.10
7) Alpha particles are repelled by atomic nuclei because
A) they both have the same sign of electric charge.
B) of the repelling interaction between an alpha particle and the
atomic nucleus.
C) closeness of each to each other is not permitted.
D)) the
h force
f
b
between
the
h alpha
l h particle
i l andd the
h atomic
i nucleus
l
is
i
opposite to an attractive force.
E)) none of these.
8) The discreteness of energy levels is better understood by considering
the electrons to be
A) attached to the nucleus by massless springs.
B) much less massive than the nucleus.
C) lik
like tiny
i planets
l
orbiting
bi i a sun.
D) all of these.
E)) none of these.
32.11
9) The Bohr model of the atom is akin to a
A) central heavy ball with lighter balls connected by springs.
B) blob of plum pudding,
pudding where raisins represent atomic nuclei.
nuclei
C) miniature solar system.
D) all of these.
10) The Schroedinger equation is restricted to
A)) submicroscopic
p pparticles.
B) macroscopic particles.
C) submicroscopic and microscopic particles.
D) none of these.
these
32.12
11) Compared to the diameter of a zirconium atom (A = 40), the
diameter of a mercury atom (A = 80) is approximately
A) four times as large.
large
B) twice as large.
C) the same size.
D)) one half
h lf as large.
l
E) one quarter as large.
12) A new theory conforms to the correspondence principle when it
A) ties two or more theories together.
B) corresponds to all theories in nature.
nature
C) updates the essence of the old theory.
D) accounts for verified results of the old theory.
E) none off these.
h
32.13
13) Most alpha particles fired at a gold foil pass through undeflected
because the
A) atoms of gold
gold, like any others,
others are mostly empty space.
space
B) electric field is zero inside the gold.
C) net charge of the gold atoms is zero.
D)) gold
ld atoms, unlike
lik most other
h metall atoms, are relatively
l i l far
f apart.
E) none of these.
14) Compared to the average diameter of a hydrogen atom, the average
diameter of a helium atom is
A) about the same.
same
B) larger.
C) smaller.
32.14
15) The correspondence principle applies to
A) theories of macroscopic phenomena.
B) theories of submicroscopic phenomena.
phenomena
C) all good theories.
32.15
-- Answers -MULTIPLE CHOICE
CHOICE.
The one alternative that best
completes the statement or
answers the question.
32.16
Chapter 32
1) Answer: A
2) Answer: D
3) Answer: B
4)) Answer: A
5) Answer: D
6)) Answer: C
7) Answer: A
8) Answer: E
9) Answer: C
10) Answer: D
11) Answer: C
12) Answer:
A
D
13) Answer: A
14)) Answer: C
15) Answer: C
32.17