Almost all solid elements are heavier than air. This is why these elements do not float under normal atmospheric situations.
Yes solvents are heavier than air
Nitrous Oxide is heavier than air.
Yes, argon is heavier than air. Argon has a higher density than air, so it will sink below the air in the atmosphere.
"Heavier than air" refers to airplanes.
An airplane is a heavier than air flying craft
Yes, LP gas is heavier than air.
Gas is heavier than oxygen. Cold air is heavir than hot air
One is lighter and the other one is heavier. :D
they are heavier than air hence why they don't fly unless in motion.
An airplane is a heavier than air flying craft
Yes, LP (liquefied petroleum gas) is heavier than air.
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.