It's lighter than air so the balloons float.
oxygen air
To inflate means to fill something with air or gas in order to make it expand or become larger and more firm. This process is commonly used in activities like inflating balloons, tires, or air mattresses.
no its oxygen cause we take the air out of the air and put it in a can
Helium is commonly used to fill balloons. It is non-flammable and lighter than air, allowing balloons to float.
Helium is typically used to fill airships and balloons due to its low density, which allows them to float in the air.
Nitrogen mixed with normal air
A craftsman air compressor is beneficial to people supplying clean high pressure air. It can be used to fill gas cylinders, supply air to divers, fill tires and power pneumatic tools.
argon
air
Hydrogen was first used but was generally replaced with helium because of it's flammability.
They're filled with Helium.
Any Gas with a lower density than 1.2kg/m^3 will make a balloon rise. However I think you are talking about helium. Gases that are lighter than air like Hydrogen etc Helium Is the lighter than air gas that is used to fill party balloon's it is an inert gas, that is it doesn't burn unlike Hydrogen which is the gas that was used in the Hindenburg air ship.