The composition of Earth's atmosphere is mostly nitrogen, carbon dioxide, and oxygen. All of these elements are denser than helium, and therefore it tends to rise.
Helium is used to inflate balloons because it is lighter than air and that makes the balloon float.
Yes
helium is a gas less dense than air.
Both are gases.
Yes, ozone is lighter than air.
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
100% of hydrogen is lighter than air
Yes methane is lighter than air because it is less dense than air.
blimp or hot air balloons are lighter than air crafts
Hot air, hydrogen or helium are lighter than cold air.
"Lighter than air." Think about it for a second.
There are many, but one is Helium