Name:
Oxygen Worksheet
1. What is the symbol for Oxygen?
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3. What is the the mass number of Oxygen?
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2. What is the chemical formula of an Oxygen molecule?
4. Describe the laboratory TEST for Oxygen gas.
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5. Define the word catalyst.
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6. Write a balanced chemical equation with state symbols,
for the decomposition of hydrogen peroxide.
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Exam question
7. The diagram below shows the laboratory preparation and collection of
oxygen gas over water.
a. Give the names of the items of the
apparatus labelled A to D. [4 marks]
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b. Name the solution X and the solid Y.
[2 marks]
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c. Why is it possible to collect oxygen over water?
[1 mark]
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