Chemistry
Pie Chart of Earth's Atmosphere Composition
Last reviewed on 2026-05-22.
Chemistry — verifiable data, editable template
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Earth's atmosphere is mostly nitrogen and oxygen, with a small fraction of argon and trace gases. Composition by volume of dry air.
The data
- Nitrogen — 78.084 %
- Oxygen — 20.946 %
- Argon — 0.934 %
- Carbon dioxide — 0.042 %
- Other trace gases — 0.001 %
Source
NOAA / NASA atmospheric data.
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