How dense is helium compared with air?

Answer 1

Which is more dense: water or helium?

- Water is more dense, because water does not float like helium does. It is below air. That's why we have oceans and lakes and rivers.

Answer 2

Helium is less dense than air because it has a lower density. This is why helium balloons can float in the air.

Answer 3

Helium is very less dense when compared to that of air. Helium's average density is about 0.18 g/ml. The density of air is about 1.22 g/ml