Edexcel IGCSE Chemistry · Spec 2.9-2.13
Gases in the Atmosphere
The gases in the atmosphere, the combustion of elements, and carbon dioxide.
Chemistry revision video
Gases in the Atmosphere
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Spec 2.9-2.13
What you need to know
- State the composition of clean air
- Describe complete and incomplete combustion
- Explain why carbon dioxide is a greenhouse gas
Active recall
Quick check
Answer each question before opening the answer.
What are the approximate percentages of nitrogen and oxygen in clean air?
About 78% nitrogen and about 21% oxygen.
What is formed when a metal or non-metal burns in oxygen?
An oxide — metals form basic oxides, non-metals form acidic oxides.
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