Section 5.3
Electron Configurations
Practice Test
1.
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.
S
c.
P
d.
Cl
Hint
2.
The total number of electrons in s orbitals in a germanium atom is ________.
a.
8
b.
6
c.
15
d.
18
Hint
3.
The principle that states each electron occupies the lowest energy orbital available is the______________.
a.
exclusion principle
b.
photoelectric principle
c.
aufbau principle
d.
uncertainty principle
Hint
4.
How many electrons can an orbital contain?
a.
4
b.
3
c.
1
d.
2
Hint
5.
What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg?
SC.A.2.4.6
a.
1.3 x 10
-38
m
b.
3.4 x 10
-34
m
c.
34 m
d.
3.4 x 10
-38
m
Hint
6.
An element with the outermost electron configuration, ns
2
np
4
, could be _______.
SC.A.2.4.5
a.
Pb
b.
Se
c.
Zr
d.
Mo
Hint
7.
The valence orbitals in an atom are the ___________.
SC.A.2.4.5
a.
d orbitals
b.
outermost orbitals
c.
innermost orbitals
d.
second energy level
Hint
8.
How many valence electrons does a group 1A metal atom have?
SC.A.2.4.5
a.
2
b.
4
c.
1
d.
3
Hint
9.
What is the electron configuration for tin Sn?
a.
Kr
5s
2
3d
10
4d
14
5p
4
b.
Kr
5s
2
3d
10
4f
14
5p
2
c.
Kr
5s
2
4d
10
5p
2
d.
Kr
5s
2
3d
10
3f
14
5p
4
Hint
10.
What is an electron dot structure?
a.
An element symbol with a positive charge.
b.
An element symbol surrounded by dots representing its valence electrons.
c.
A filled noble gas in brackets plus the remaining electron configuration expressed by filled orbitals.
d.
An element symbol surrounded by its innermost electrons.
Hint
11.
How many electrons are in the highest energy p orbitals of a group 4A atom?
SC.A.2.4.5
a.
1
b.
4
c.
2
d.
3
Hint
12.
An element whose atoms have four valence electrons is _______.
a.
Nb
b.
Cr
c.
Sn
d.
Ti
Hint
