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Worksheet 18: Chemical formulas . Topic 5 - Chemical formulas

Set A: Terms and definitions Objective: By defining these words, you’ll become more
familiar with formula related terms and their definitions.

Define, neatly and clearly, the following chemical formula related terms.

1. Chemical formula

2. Qualitative

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3. Quantitative

4. Subscript
Need help? Study Book : Use Glossary

5. Molecular formula

6. Empirical formula

7. Binary compound Teacher Preview Copy

8. Polyatomic ion

Set B: Counting atoms in formulas Objective: To test your ability to determine the number of
each atom and total number of atoms in formulas
For each chemical formula given, indicate the number of each atom listed and the total number of
atoms in the formula.
Number of each atom Total number of atoms in each formula
9. HClO3 ____ H atoms
____ Cl atoms __________
____ O atoms

10. NH4C2H3O2 ____ N atoms

____ H atoms __________ Need help? Study Book pg 97 Set 1

____ C atom
____ O atoms

11. Mg(NO3)2 ____ Mg atoms __________
____ N atoms
____ O atoms

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