Polyatomic Ions Worksheet
Grade 11 Chemistry worksheet focusing on identifying, naming, and writing formulas for polyatomic ions and their compounds.
Includes
Standards
Polyatomic Ions Challenge
Name:
Date:
Score:
Read each question carefully and provide the best answer. Show all your work for calculations.
1. A polyatomic ion is a group of covalently bonded atoms that carries an overall electric .
2. The ammonium ion has the chemical formula and a charge of .
3. The suffix '-ate' generally indicates that the polyatomic ion contains .
4. When writing chemical formulas with polyatomic ions, if there is more than one polyatomic ion, it must be enclosed in .
5. Which of the following is the correct formula for the sulfate ion?
SO3^2-
SO4^2-
S2O3^2-
SO3^-
6. What is the name of the polyatomic ion CO3^2-?
Carbonate
Carbonite
Oxalate
Carbon dioxide
Match the polyatomic ion with its correct name.
7. OH^-
a. Nitrate
8. NO3^-
b. Hydroxide
9. PO4^3-
c. Phosphate
10. CN^-
d. Cyanide
11. Write the chemical formula for calcium phosphate.
12. Name the compound with the formula NaHCO3.
13. Explain why parentheses are used when writing the formula for magnesium hydroxide, Mg(OH)2.
14. All polyatomic ions are anions.
True
False
15. The charge of a polyatomic ion is the sum of the oxidation states of its constituent atoms.
True
False
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