WorksheetsElectron Configurations
Total questions: 34
Worksheet time: 45mins
Name
Class
Date
1.
The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is
a)
3
b)
6
c)
8
d)
10
2.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
3.
What is the noble gas shorthand electron for Sulfur atom?
a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p4
4.
What atom matches this electron configuration?
[Xe] 6s25d9
[Xe] 6s25d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
5.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
6.
What electron configuration matches an oxygen ion?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
7.
Which of the following is the smallest in size?
a)
N3-
b)
O2-
c)
F-
d)
Na+
8.
Which of the following is the smallest in size?
a)
K
b)
Na
c)
Li
d)
Cs
9.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
10.
How many valence electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
11.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
12.
An orbital can at most hold how many electrons?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
13.
The electron configuration of an atom is 1s22s22p6. The number of valence electrons in the atom is
a)
3
b)
6
c)
8
d)
10
14.
What atom is represented here?
a)
Carbon
b)
Nitrogen
c)
Oxygen
d)
Fluorine
15.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
16.
What is the electron configuration for this atom?
a)
1s22s22p6
b)
1s22s22p5
c)
1s22s22p3
d)
2s22p3
17.
What is the highest occupied energy level?
a)
1
b)
2
c)
3
d)
4
18.
What is the highest occupied energy level?
a)
4
b)
5
c)
6
d)
7
19.
How many valence electrons are there?
a)
1
b)
2
c)
8
d)
79
20.
Valence electrons are:
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
21.
Magnesium's ion
a)
Mg+
b)
Mg2+
c)
Mg-
d)
Mg2-
22.
Which element is depicted from this atomic orbital diagram?
a)
Carbon
b)
Nitrogen
c)
Oxygen
d)
Phosphorus
23.
Which element is depicted from this orbital diagram
a)
Fluorine
b)
Neon
c)
Chlorine
d)
Argon
24.
Which is associated with more energy?
a)
2p
b)
2s
c)
3p
d)
1s
25.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
26.
When an atom gains a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
27.
Atoms that gain & lose electrons are called _________
a)
ions
b)
isotopes
c)
radioactive
d)
corrosive
28.
Where are the metalloids / semimetals located on the periodic table?
a)
Blue
b)
Red
c)
Green
29.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
30.
What is the charge of an atom that has gained one electron?
a)
-1
b)
-2
c)
+1
d)
+2
31.
Cations are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
32.
Anions are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
33.
How many unpaired electrons would lithium have?
a)
1
b)
2
c)
3
d)
0
34.
What atom matches this electron configuration?
1s22s22p63s2
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
100 %
