as a liquid and solid it is not - as a gas I suspect not although I'm not sure
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
There are many, but one is Helium
Yes, Mercury is heavier than water. Mercury has a density of 13.6 g/cm³, which is much greater than the density of water at 1 g/cm³.
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Heated air that is lighter than surrounding air will rise, as it is less dense. This process creates convection currents, with cooler air moving in to replace the rising warm air.
Aluminum is the lighter than mercury.
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
salted water
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.
it means that it is a flying device that is lighter than air.