It is lighter than air.
it is lighter than water.
Methane is lighter than air.
Helium is lighter than air
Oxygen is the heavier part, nitrogen and argon are lighter, even water vapor is lighter.
They are 2.7 times heavier.
Aluminum is actually lighter than titanium
One is lighter and the other one is heavier. :D
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
Carbon Dioxide is heavier than the air.
meson is heavier than electron but lighter than proton
they're lighter than air
Radon is denser than air.
Xenon is more than 4.5 times heavier than air.