Chapter 5:
Electrons in Atoms
Practice Test
1.
How many electrons can an orbital contain?
a.
3
b.
4
c.
1
d.
2
Hint
2.
A wavelength of 500 nm is associated with the _______ portion of the electromagnetic spectrum.
a.
visible
b.
infrared
c.
microwave
d.
ultraviolet
Hint
3.
The part of the electromagnetic spectrum that humans can see is the ________.
a.
ultraviolet spectrum
b.
infrared spectrum
c.
a, b, and c
d.
visible spectrum
Hint
4.
In the periodic table, the principal quantum number corresponds to the ________.
a.
transition metals
b.
lanthanides
c.
group number
d.
period number
Hint
5.
When an atom loses energy by electron transition, a(n) _____________ is produced.
a.
adsorption
b.
ion
c.
absorption
d.
emission
Hint
6.
Which one of the following electron configurations is incorrect?
a.
Ca-----1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
b.
Cu-----[Ar]3d
10
4s
1
c.
Mn-----[Ar]4s
2
4d
5
d.
Xe-----[Kr]4d
10
5s
2
5p
6
Hint
7.
The ground state of hydrogen corresponds to the _________.
a.
zeroeth energy level
b.
highest energy level
c.
first energy level
d.
second energy level
Hint
8.
The principle that states each electron occupies the lowest energy orbital available is the ______________.
a.
photoelectric principle
b.
exclusion principle
c.
aufbau principle
d.
uncertainty principle
Hint
9.
What is an electron dot structure?
a.
A filled noble gas in brackets plus the remaining electron configuration expressed by filled orbitals.
b.
An element symbol surrounded by its innermost electrons.
c.
An element symbol with a positive charge.
d.
An element symbol surrounded by dots representing its valence electrons.
Hint
10.
The minimum amount of energy that can be gained or lost by an electron is a _________.
a.
planck
b.
quart
c.
queue
d.
quantum
Hint
11.
Which of the following statements is true?
a.
All s orbitals are spherically shaped.
b.
Each set of d orbitals contains seven orbitals.
c.
Each set of d orbitals can hold a maximum of 14 electrons.
d.
The first energy level contains only s and p orbitals.
Hint
12.
How many types of orbitals are present in atoms of elements in the third period of the periodic table?
a.
1
b.
2
c.
4
d.
3
Hint
13.
What is the lowest energy state of an atom called?
a.
the chaotic state
b.
the solid state
c.
the excited state
d.
the ground state
Hint
14.
An element with the outermost electron configuration,
n
s
2
n
p
4
, could be _______.
a.
Zr
b.
Mo
c.
Pb
d.
Se
Hint
15.
What is the electron configuration for tin (Sn)?
a.
5s
2
4d
10
5p
2
b.
[Kr]5s
2
3d
10
4f
14
5p
2
c.
[Kr]5s
2
3d
10
3f
14
5p
4
d.
[Kr]5s
2
3d
10
4d
14
5p
4
Hint
16.
How many valence electrons does a group 1A metal atom have?
a.
4
b.
1
c.
3
d.
2
Hint
17.
Which of the following power sources makes use of the photoelectric effect?
a.
solar power cells
b.
nuclear power plants
c.
alkaline batteries
d.
diesel engines
Hint
18.
One of mercury’s spectral lines has a wavelength of 6.234 × 10
-7
m. What is the line’s frequency?
a.
1.87 × 10
6
s
-1
b.
4.81 × 10
14
s
-1
c.
4.81 × 10
6
s
-1
d.
1.87 × 10
14
s
-1
Hint
19.
The concept that all moving particles have wave characteristics is attributed to ___________.
a.
de Broglie
b.
Thomson
c.
Bohr
d.
Heisenberg
Hint
20.
The valence orbitals in an atom are the ___________.
a.
d orbitals
b.
second energy level
c.
innermost orbitals
d.
outermost orbitals
Hint
