Yes, hydrogen is lighter than air and so causes the balloon to float.
Helium
Hydrogen can make a balloon float. Nitrogen, argon, and chlorine will not. However, hydrogen is combustible and in a balloon that cam near an ignition source, could produce a fire or explosion. The preferred gas for balloons, if cost is not an issue, is helium, which does not burn and is still very light.
Helium is used in balloons because it is much less dense than air, allowing the balloons to float and is completely nontoxic and nonflammable unlike hydrogen, which is otherwise a superior lifting gas.
If I am right in interpreting the question as "Are balloons normally filled with hydrogen and oxygen?", then the answer would be no. Although they can be, as both substances are gases, the majority of balloon are filled with air, a mixture of nitrogen, oxygen, carbon dioxide and other gases. If you mean the balloons that float, they are filled with helium
Because it is very light
Hydrogen is used in weather balloons because they are very light which help the balloon to float or fly easily.
Balloons filled with it float in air
The game is called Float.
they don't float ONLY with helium. They float with any gas that is less dense than air, for instance hydrogen.
Yes, hydrogen is lighter than air and so causes the balloon to float.
Helium is lighter than air. so balloons filled with helium will float in air. warming will make them float or rise up faster.
To rise, they need something to float on - i.e., air.
Helium
Helium
Hydrogen can make a balloon float. Nitrogen, argon, and chlorine will not. However, hydrogen is combustible and in a balloon that cam near an ignition source, could produce a fire or explosion. The preferred gas for balloons, if cost is not an issue, is helium, which does not burn and is still very light.
Yes, party balloons that float are filled with helium. Helium is used because it is lighter than air, causing the balloon to float upwards, but safer than the alternative hydrogen, which is explosive.