Ions Practice Worksheet
Name: _________________
Determine the charges on the following:
1. An atom having lost two electrons
2. An atom having lost six electrons
3. An atom having gained one electron
4. An atom having gained three electrons
5. An atom having lost five electrons
6. An atom having gained two electrons
7. An atom having lost one electron
8. An atom having gained four electrons
________
________
________
________
________
________
________
________
Complete the following:
9. For each of the positive ions listed in column 1, determine the number of electrons that ion contains.
____ Al+3
____ Fe+3
____ Mg+2
____ Sn+2
____ Co+2
____ Co+3
____ Li+1
____ Cr+3
____ Rb+1
____ Pt+2
Element/Ion
1
1
1
1
Number of
Protons
Number of
Neutrons
Number of
Electrons
Mass
Number
28
66
H
H+
35
17
24
12
Atomic
Number
Cl-
Mg 2+
108
47
Ag+
32
16
S2-
30
76
114
Answer the following questions:
10. Define an ion.
11. Answer the following about ions:
a. How can you tell if an atom has a negative charge?
b. What do we call an ion with a negative charge?
c. How can you tell if an atom has a positive charge?
d. What do we call an ion with a positive charge?