Forming and Naming Ionic Compounds
Introduction:
Ionic bonds are formed because of the gain and loss of electrons. When an atom loses electrons it forms a cation, a positively charged ion. When an atom gains electrons, it forms an anion, a negatively charged ion.
Polyatomic ions are a combination of different atoms that jointly have a positive or negative charge. In the following activity, you will form various ionic compounds representing them using a formula and a puzzle representation. You will name each compound accordingly.
Procedure:
1.
One student in your group should obtain the following items: scissors, rulers, glue, puzzles pieces, and colored paper.
2.
Using a ruler, create a data table consisting of 5 columns and 16 rows (one row is for your headings). It is encouraged that you begin with the first two rows and then add the remaining rows as you need them.
3.
Title the columns accordingly: Cation, Anion, Formula, Constructed Molecule, and Compound Name.
4.
For the given substances, identify the cation and anion, then create its formula using the rules for ionic bonding.
5.
Cut out the respective puzzle pieces to confirm your formula. If your formula is correct, your puzzle will form an even square. Paste your correct puzzle in the appropriate column.
6.
Name the ionic compound.
7.
You will complete a total of 15 different ionic bonds, 10 of which are given below, the other 5 should be created on your own with the remaining puzzle pieces.
8.
Your assigned substances are:
1) Aluminum and bromine
2) Sodium and oxygen
3) Iron(II) and sulfur
4) Nitrate and aluminum
5) Sulfate and potassium
6) Chlorine and iron(III)
9) Iron(III) and sulfate
10) Phosphate and sodium
11) Your choice
12)
13)
Your choice
Your choice
7) Ammonium and sulfur
8) Aluminum and oxygen
14) Your choice
15) Your choice
9.
Please make sure that all supplies are returned to their proper location and all paper scraps are cleaned up and thrown away.
10.
At the bottom or on the back of your data table, answer the given analysis questions.
Analysis Questions:
1.
Some compounds are described as binary. What does this mean?
2.
What ending is given to the name of binary compounds? Refer to your data table and LIST the formulas for all binary compounds that you made.
3.
Some metals have more that one charge possible. Use roman numerals to write the names for the following compounds. a.
SnCl
2 b.
SnCl
4 c.
FeBr
3 d.
FeCl
2
4.
Using your compounds, finish the following sentences with metal or nonmetal. a.
Polyatomic ions are made of________________________. b.
Positive ions are______________________. c.
Negative ions are_____________________.