Name: _________________________________Period: _______Date: _____________
Ions Practice Bonanza
Standard: Use the Periodic Table to identify atoms (including ions and isotopes) based on their atomic number, atomic mass, and subatomic particles.
Objective: Define an ion and calculate its number of electrons.
1. Lithium2. Boron
Charge
Number of Electrons
Charge
Number of Electrons
0
0
+1
+1
+2
3
0
+3
3. Oxygen4. Sodium
Charge
Number of Electrons
Charge
Number of Electrons
0
0
-1
+1
-2
-2
5. Carbon6. Nitrogen
Charge
Number of Electrons
Charge
Number of Electrons
0
0
+1
-3
-1
+2
Complete the following table using the strategies we learned today.
Atom
Charge
Number of Electrons
Cation, Anion or Neutral?
Magnesium
0
Magnesium
+2
Fluorine
10
Beryllium
3
Neon
-1
Potassium
+1
Sulfur
18
-1
8
Calcium
+2
+1
36
Arsenic
36
Calculate the number of protons neutrons and electrons given the isotope symbol. BEWARE of the charge! Remember: when SUBTRACTING negative numbers its the same as ADDING!
Isotope Symbol
Atomic Number
Atomic Mass
# of protons
# of neutrons
# of electrons
Cation, Anion or Neutral?
Name: _________________________________Period: _______Date: _____________
Ions Homework
1. What is an ion? ___________________________________________________________
________________________________________________________________________
2. How is a sodium atom the same as a sodium ion? _______________________________
________________________________________________________________________
3. How is a sodium atom different from a sodium ion? _____________________________
________________________________________________________________________
4. When an ion is positive, it has _______________________ (gained/lost) electrons.
5. Another name for a positive ion is a ______________________________.
6. When an ion is negative it has _______________________ (gained/lost) electrons.
7. Another name for a negative ion is a ______________________________.
8. Determine the charges of the following atoms:
a. An atom that has lost 2 electrons _________________
b. An atom that has lost 6 electrons _________________
c. An atom that has gained 1 electron _________________
d. An atom that has gained 3 electrons _________________
e. An atom that has lost 5 electrons _________________
f. An atom that has gained 2 electrons _________________
g. An atom that has lost 1 electron _________________
h. An atom that has gained 4 electrons _________________
Answer questions 9-12 using the diagram below. Make sure to EXPLAIN YOUR ANSWERS completely or youll only receive half credit on your homework.
9. Which of the above are ions? Explain your reasoning.
10. Which one(s) are cations? Explain your reasoning.
11. Which one(s) are anions? Explain your reasoning.
12. Are any of the above atoms neutral? How do you know?
Complete the following table using your periodic table!
Ion
Symbol
Atomic Number
Mass Number
Protons
Neutrons
Electrons
Iodine
I-1
127
53
54
Cl-1
35
17
Hydrogen
1
1
0
Br-1
35
46
35
79
36
B+3
5
11
Oxygen
O-2
16
8
Nitrogen
7
7
10
Aluminum
Al+3
27
10
Fe+2
56
26
24
Cu+1
29
34
63
29
27
