Yes. I would go with helium if you can get it. Hydrogen can explode.
Helium is an inert gas."They fill Helium in the balloons", father explains his child.
it can be used to fill helium balloons
Helium
If you want the balloons to float, you would probably use helium.
Helium is an element. It is used to fill balloons and things.
hot air balloons
Helium
HELIUM
element
25 Balloons (Approx.)(I might be wrong as I am not sure)
Helium molecules have a lower molecular weight than air. This is why balloons filled with Helium will float in the air. Apex:element
if its possible then the reason could be the expansion of high pressured helium from tank to balloon is large.