5 ms·
Losses to space is the reason we have relatively so little but in absolute terms that's still a huge amount. Helium makes up 5 millionths of the atmosphere. E
by Symmetry 10y ago
Losses to space is the reason we have relatively so little but in absolute terms that's still a huge amount. Helium makes up 5 millionths of the atmosphere.
EDIT: Thanks for the correction.
- logfromblammo 10y agoOne half-millionth is 2 ppm. Half of one-millionth is 0.5 ppm. Wikipedia says the concentration is 5.2 ppm.