Chapter 3 Atomic Structure: Images of the Invisible Invisible

Chapter 3
Atomic Structure: Images of the
Invisible
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Education, Inc.
Experiments by J. J. Thomson showed that cathode
rays are composed of what elementary particles?
a.
b.
c.
d.
Protons
Electrons
Neutrons
Alpha
particles
e. Positrons
Copyright © 2010 Pearson
Education, Inc.
Experiments by J. J. Thomson showed that cathode
rays are composed of what elementary particles?
a.
b.
c.
d.
Protons
Electrons
Neutrons
Alpha
particles
e. Positrons
Copyright © 2010 Pearson
Education, Inc.
A helium nucleus that is emitted during some
radioactive decay processes is also called a(n):
a.
b.
c.
d.
e.
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Education, Inc.
Alpha particle
Beta particle
Gamma particle
Delta particle
Sigma particle
A helium nucleus that is emitted during some
radioactive decay processes is also called a(n):
a.
b.
c.
d.
e.
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Education, Inc.
Alpha particle
Beta particle
Gamma particle
Delta particle
Sigma particle
Which of these electronic transitions would result in the
emission of visible light (where n = energy level)?
a.
b.
c.
d.
e.
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Education, Inc.
n = 5 to n = 2
n = 2 to n = 5
n = 3 to n = 1
n = 7 to n = 3
n = 4 to n = 1
Which of these electronic transitions would result in the
emission of visible light (where n = energy level)?
a.
b.
c.
d.
e.
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Education, Inc.
n = 5 to n = 2
n = 2 to n = 5
n = 3 to n = 1
n = 7 to n = 3
n = 4 to n = 1
Isotopes are elements that differ only in their:
a. Atomic number
b. Nuclear charge
c. Number of electrons in
the neutral atom
d. Atomic mass
e. Chemical properties
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Education, Inc.
Isotopes are elements that differ only in their:
a. Atomic number
b. Nuclear charge
c. Number of electrons in
the neutral atom
d. Atomic mass
e. Chemical properties
Copyright © 2010 Pearson
Education, Inc.
How many valence electrons does chlorine have?
a.
b.
c.
d.
e.
8
7
6
5
4
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Education, Inc.
How many valence electrons does chlorine have?
a.
b.
c.
d.
e.
8
7
6
5
4
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Education, Inc.
Elements in the same group of the periodic table
exhibit what tendency?
a.
b.
c.
d.
e.
Similar chemical properties and reactivity
The same total number of electrons
Similar atomic masses
Similar appearances and physical properties
Different numbers of valence electrons
Copyright © 2010 Pearson
Education, Inc.
Elements in the same group of the periodic table
exhibit what tendency?
a.
b.
c.
d.
e.
Similar chemical properties and reactivity
The same total number of electrons
Similar atomic masses
Similar appearances and physical properties
Different numbers of valence electrons
Copyright © 2010 Pearson
Education, Inc.