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The Quantum Mechanical
Model
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Printed: September 19, 2015
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C HAPTER
Chapter 1. The Quantum Mechanical Model
1
The Quantum Mechanical
Model
Lesson Quiz
Name___________________ Class______________ Date________
Multiple Choice:
1. The study of motion in large objects is called
a.
b.
c.
d.
traditional mechanics
quantum mechanics
classical mechanics
quantized mechanics
2. According to the Heisenberg Uncertainty Principle, the velocity and position of which of the following can
never be measured very accurately?
a.
b.
c.
d.
a traveling missile
an electron in motion
a hockey puck shot at the goal
atomic emission lines
3. An electron cloud
a.
b.
c.
d.
shows exactly where the electron is located
gives a 75% probability of where the electron is located
gives a 90% probability of where the electron is located
gives a 65% probability of where the electron is located
4. Each electron can be described by _____ quantum numbers.
a.
b.
c.
d.
two
four
six
eight
5. The highest allowable sublevel for n = 3 is
a.
b.
c.
d.
s
f
d
p
6. The spin quantum number has _____ values.
a.
b.
c.
d.
two
three
one
four
7. The units of mass in the de Broglie wave equation are
a. µg
1
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b. mg
c. g
d. kg
8. An increase in the quantum number n means ________ in the distance of the electron from the nucleus.
a.
b.
c.
d.
an increase
no change
a decrease
a variable response
9. If the principal quantum number n = 4, the angular quantum number can have values for zero to
a.
b.
c.
d.
2
4
1
3
10. The magnetic quantum number tells us the
a.
b.
c.
d.
shape of the orbital
orientation of the orbital around the nucleus
distance of the orbital from the nucleus
spin of the orbital
True/False:
11. _____ The Bohr model of the atom only explains the behavior of the hydrogen electron.
12. _____ Electrons in atoms do not have defined energy levels.
13. _____ It is not possible to measure simultaneously the exact velocity and location of a jet plane traveling at
645 miles/hour.
14. _____ The Schrödinger wave equation predicts the probability of finding an electron in a given area of space.
15. _____ An orbital represents a two-dimensional area of space.
16. _____ The spin quantum number can have up to four values.
17. _____ The s orbital has a spherical shape.
18. _____ The principal quantum number designates the principal energy level occupied by the electron.
19. _____ The term for the discrete energy levels of an electron is quantal.
20. _____ Two electrons in the same orbital cannot have the same spin quantum number.
Fill in the Blank:
21. The following image is a depiction of a ____ orbital.
22.
23.
24.
25.
2
A d orbital electron can assume any one of _____ different orientations.
If the angular momentum quantum number has an l of 0, that designates an ___ orbital.
The study of the motions of subatomic particles is called ______ ________ .
Solutions to the Schrödinger equation are called _______ functions.
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26.
27.
28.
29.
Chapter 1. The Quantum Mechanical Model
Each electron can be described by ____ quantum numbers.
A maximum of ____ electrons can be found in p orbitals.
The equation that described the wave nature of any particle was developed by ______ _________ .
Calculate the wavelength of a space shuttle with a mass of 2.05 × 107 kg travelling at a rate of 7.85 × 103 m/s.
Short Answer:
30. What major change in our thinking about the path of a moving electron had to be made with the advent of
quantum theory?
3