Chemical Formulas Worksheet
A worksheet for 8th-grade science students to practice understanding and writing chemical formulas.
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Chemical Formulas Worksheet
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Read each question carefully and provide the best answer. Remember to use your knowledge of chemical symbols and subscripts.
1. What does the subscript number in a chemical formula represent?
The atomic number of the element
The number of atoms of that element in the compound
The total number of elements in the compound
The mass number of the element
2. Which of the following is the chemical formula for water?
CO2
O2
H2O
NaCl
3. A chemical formula uses chemical and to show the composition of a compound.
4. The chemical symbol for Oxygen is .
5. In the formula C6H12O6, there are atoms of Carbon.
6. Explain the difference between an element and a compound.
7. All chemical formulas contain at least two different elements.
True
False
8. The chemical formula for table salt is NaCl.
True
False
Match the chemical formula with its common name.
9. CH4
a. Carbon Dioxide
10. CO2
b. Methane
11. O3
c. Ozone