Section 5.3
Electron Configurations
Practice Test
1.
What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg?
a.
1.3 x 10
-38
m
b.
3.4 x 10
-38
m
c.
3.4 x 10
-34
m
d.
34 m
Hint
2.
How many electrons can an orbital contain?
a.
1
b.
2
c.
3
d.
4
Hint
3.
What is the symbol of the element that has the following electron configuration? 1s
2
2s
2
2px
2
2py
2
2pz
2
3s
2
3px
2
3py
2
3pz
1
a.
Si
b.
P
c.
S
d.
Cl
Hint
4.
The principle that states each electron occupies the lowest energy orbital available is the ______________.
a.
aufbau principle
b.
uncertainty principle
c.
exclusion principle
d.
photoelectric principle
Hint
5.
What is the electron configuration for tin (Sn)?
a.
[Kr]5s
2
3d
10
3f
14
5p
4
b.
[Kr]5s
2
3d
10
4d
14
5p
4
c.
[Kr]5s
2
3d
10
4f
14
5p
2
d.
[Kr]5s
2
4d
10
5p
2
Hint
6.
The valence orbitals in an atom are the ___________.
a.
innermost orbitals
b.
second energy level
c.
d orbitals
d.
outermost orbitals
Hint
7.
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.
Hint
8.
An element with the outermost electron configuration, ns
2
np
4
, could be _______.
a.
Pb
b.
Zr
c.
Mo
d.
Se
Hint
9.
An element whose atoms have four valence electrons is _______.
a.
Nb
b.
Cr
c.
Sn
d.
Ti
Hint
10.
The total number of electrons in s orbitals in a germanium atom is ________.
a.
18
b.
15
c.
8
d.
6
Hint
11.
How many electrons are in the highest energy p orbitals of a group 4A atom?
a.
1
b.
2
c.
3
d.
4
Hint
12.
How many valence electrons does a group 1A metal atom have?
a.
1
b.
2
c.
3
d.
4
Hint
