air

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Introduction

A mixture of odourless gases found in the atmosphere in the following approximate percentages by volume after water vapor has been removed.

gas % in atmosphere
Oxygen 20.95
Nitrogen 78.08
Argon 0.93
Carbon dioxide(CO2) 0.03
Other gases 0.01

More specific terms

References

  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.