Electrons in Atoms
Practice Test
1.
The minimum amount of energy that can be gained or lost by an electron is a _________.
a.
quart
b.
queue
c.
quantum
d.
planck
2.
What is the maximum number of electrons that can be present in each principal energy level of hydrogen?
Hydrogen’s First Four Principal Energy Levels
Principal quantum number( n)
Sublevels (types of orbitals) present
Number oforbitals related to sublevel
Total number
of orbitals related to principal energy level
(n
2
)
1
s
1
1
2
s
p
1
3
4
3
s
p
d
135
9
4
s
p
d
f
1
3
5
7
16
a.
n
2
b.
n
c.
2n
2
d.
2n
3.
What is the wavelength of a radio wave having a frequency of 3.75 x 10
7
Hz?
a.
8.0 m
b.
80 m
c.
.08 m
d.
0.8 m
4.
How many types of orbitals are present in atoms of elements in the third period of the periodic table?
a.
4
b.
3
c.
1
d.
2
5.
What is an electron dot structure?
a.
An element symbol surrounded by dots representing its valence electrons.
b.
An element symbol surrounded by its innermost electrons.
c.
An element symbol with a positive charge.
d.
A filled noble gas in brackets plus the remaining electron configuration expressed by filled orbitals.
6.
Which of the following statements is true?
a.
All s orbitals are spherically shaped.
b.
Each set of d orbitals contains seven orbitals.
c.
The first energy level contains only s and p orbitals.
d.
Each set of d orbitals can hold a maximum of 14 electrons.
7.
The principle that states each electron occupies the lowest energy orbital available is the ______________.
a.
uncertainty principle
b.
aufbau principle
c.
photoelectric principle
d.
exclusion principle
8.
Which of the following power sources makes use of the photoelectric effect?
a.
nuclear power plants
b.
alkaline batteries
c.
solar power cells
d.
diesel engines
9.
Which of the following affects the amplitude of a wave?
a.
speed of light
b.
wavelength
c.
frequency
d.
amount of energy carried by the wave
10.
How many valence electrons does a group 1A metal atom have?
a.
3
b.
4
c.
1
d.
2
11.
How many electrons can an orbital contain?
a.
2
b.
1
c.
3
d.
4
12.
The ground state of hydrogen corresponds to the _________.
a.
zeroeth energy level
b.
highest energy level
c.
first energy level
d.
second energy level
13.
In the periodic table, the principal quantum number corresponds to the ________.
a.
transition metals
b.
period number
c.
lanthanides
d.
group number
14.
The part of the electromagnetic spectrum that humans can see is the ________.
a.
visible spectrum
b.
infrared spectrum
c.
a, b, and c
d.
ultraviolet spectrum
15.
An element with the outermost electron configuration, ns
2
np
4
, could be _______.
a.
Se
b.
Pb
c.
Zr
d.
Mo
