Helium
Helium to get them to float.
Balloons are usually filled with helium gas to make them float. Helium is lighter than air and provides the necessary lift for the balloon to float.
which gas is in ballons
with the gas helium or fire
Helium
Balloons float in the air because they are filled with a gas that is lighter than the surrounding air. This gas, typically helium or hydrogen, creates buoyancy, causing the balloon to rise and float.
If you want the balloons to float, you would probably use helium.
Those balloons are filled with helium gas. Helium is lighter than air. Helium is a noble gas.
Helium balloons float because helium gas is lighter than the surrounding air. This causes the balloon to be buoyant and rise up in the atmosphere.
Balloons float in the air because they are filled with a gas that is lighter than the surrounding air, such as helium or hot air. This creates a buoyant force that allows the balloon to rise and float.
Helium gas is found in balloons that rise to the ceiling. This gas is less dense than air, causing the balloon to float upward.
So that the balloons float