Estimate

A randomly chosen dry-air particle is argon

Probability:
0.934%
Odds:
1 to 106
dBan
−20.3 dBan

By particle count, argon atoms make up about 0.934% of the representative dry-air sample.

Calculation

p ≈ 0.00934 by particle count

Assumptions

Under an ideal-gas model, the published dry-air volume fraction equals the particle fraction. Local composition varies.

Sources

  1. NASA Earth Fact Sheet composition updated 15 November 2024