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Chapter 9 Quiz

38 Questions  I  By Jlsanko
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1.  An atom emits a phtoon when one of its orbital electrons
A.
B.
C.
D.
2.  The narrower the wave packet of a particle is
A.
B.
C.
D.
3.  According to the uncertainity principle, it is impossible to precisely determine at the same time a particle's 
A.
B.
C.
D.
4.  The mass of a photon
A.
B.
C.
D.
5.  When the speed of the electrons that strike a metal surface is increased, the result is an increase in
A.
B.
C.
D.
6.  An electron in a p state of an atom has an angular momentum quantum number l of 
A.
B.
C.
D.
7.  Which of teh following types of radiation is not emitted by the electronic structures of atoms? 
A.
B.
C.
D.
8.  Most stars are hot objects surrounded by cooler atmosphere. The spectrum of such a star is a
A.
B.
C.
D.
9.  How many quantum numbers are needed to determine the size and shape of an atomic orbital?
A.
B.
C.
D.
10.  A neon sign does not produce
A.
B.
C.
D.
11.  According to the exclusion principle, no two electrons in an atom can have the same
A.
B.
C.
D.
12.  The description of a moving body in terms of matter waves is legitimate because
A.
B.
C.
D.
13.  THe emission spectrum produced by the excited atoms of an element contains frequencies that are 
A.
B.
C.
D.
14.  The quantum-mechanical theory of the atom is 
A.
B.
C.
D.
15.  An s orbital
A.
B.
C.
D.
16.  According to the theories of modern physics, 
A.
B.
C.
D.
17.  The electrons in an atom all have the same 
A.
B.
C.
D.
18.  The speed of the wave packet that corresponds to a moving particle is 
A.
B.
C.
D.
19.  A quantum number is not associated with an atomic electron's 
A.
B.
C.
D.
20.  Which of the following properties is not characteristic of the light waves from a laser? 
A.
B.
C.
D.
21.  The classical model of the hydrogen atom falls because
A.
B.
C.
D.
22.  The energy difference between adjacent energy levels in the hydrogen atom
A.
B.
C.
D.
23.  When an atom absorbs a photon of light, which one or more of the following can happen? 
A.
B.
C.
D.
E.
24.  If Planck's constant were larger than it is, 
A.
B.
C.
D.
25.  According to the theories of modern physics, light
A.
B.
C.
D.
26.  The operation of the laser is based upon 
A.
B.
C.
D.
27.  In a vaccum, all photons have the same
A.
B.
C.
D.
28.  WHen light is directed at a metal surface, the energies of the emitted electrons
A.
B.
C.
D.
29.  An electron can revolve in an orbit around an atomic nucleus without radiating energy provided that the orbit
A.
B.
C.
D.
30.  The orbital of an atomic electron is 
A.
B.
C.
D.
31.  The rate at which an object emits electromagnetic energy does not depend on its
A.
B.
C.
D.
32.  In the Bohr model of the atom, the electrons revolve around the nucleus of an atom so as to 
A.
B.
C.
D.
33.  The photoelectric effect can be understood on the basis of 
A.
B.
C.
D.
34.  A phenomenon that cannot be understood with the help of the quantum theory of light is 
A.
B.
C.
D.
35.  A hydrogen atom is said to be in its ground state when its electron 
A.
B.
C.
D.
36.  De Broglie waves can be regarded as waves of 
A.
B.
C.
D.
37.  Electrons behave like
A.
B.
C.
D.
38.  According to the Bohr model of the atom, an electron in the ground state
A.
B.
C.
D.
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