WorksheetsElectron Configurations
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
What atom matches this electron configuration?
1s22s22p63s23p64s23d3
a)
Vanadium
b)
Copper
c)
Nickel
d)
Germanium
2.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
3.
The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is
a)
3
b)
6
c)
8
d)
10
4.
Which electron configuration belongs to Chlorine (Cl)?
a)
1s2 2s2 2p6 3s2 3p5
b)
1s2 2s2 2p6 3s2 3p6
c)
1s2 2s2 2p6 3s2 3p7
5.
How many electrons can the d sublevel hold?
a)
14
b)
10
c)
2
d)
6
6.
How many electrons can the s sublevel hold?
a)
14
b)
10
c)
2
d)
6
7.
What atom matches this electron configuration?
1s22s22p63s2
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
8.
Each row on the periodic table represents:
a)
an energy level
b)
a sublevel
c)
an electron
d)
an orbital
9.
In an electron configuration, the energy levels are denoted by:
a)
letters
b)
coefficients
c)
a combination of letters and numbers
d)
superscripts
10.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
11.
What is the electron configuration for this atom?
a)
1s22s22p6
b)
1s22s22p5
c)
1s22s22p3
d)
2s22p3
12.
Which element is depicted from this orbital diagram
a)
Fluorine
b)
Neon
c)
Chlorine
d)
Argon
13.
Which is associated with more energy?
a)
2p
b)
2s
c)
3p
d)
1s
14.
What is the electron configuration of iron?
a)
1s22s22p63s23p64s23d6
b)
1s22s22p63s23p63d8
c)
1s22p63s23p64s23d6
d)
1s22s22p63s23p64s13d6
15.
What is the total number of energy levels used by an atom of aluminum
(Al, atomic #13) in the ground state?
(Al, atomic #13) in the ground state?
a)
3
b)
7
c)
13
d)
0
16.
Identify the following element:
1s22s22p63s23p64s23d104p65s24d9
a)
Silver
b)
Copper
c)
Cadmium
d)
Cobalt
17.
Identify the element whose electron configurations ends with 5p3
a)
As
b)
Te
c)
Sb
d)
Sn
18.
According to the Aufbau Principle, which sublevel should starting filling with electrons before the 3p sublevel?
a)
3s
b)
2p
c)
4s
d)
4p
19.
How many unpaired electrons are in an atom of strontium? (hint... draw the boxes and arrows!)
a)
0
b)
1
c)
2
d)
3
20.
How many unpaired electrons are in an atom of germanium? ((hint... draw the boxes and arrows!))
a)
2
b)
3
c)
4
d)
5
100 %
