'Helium' because it is also an INERT (Noble) gas.
Hydrogen could be used to make the balloon float/rise, but hydrogen is a flammable gas. On explosion you will have a flash of flame.
Helium
Neon is a colorless, transparent gas.
The elements that are colorless gases at room temperature are hydrogen, helium, nitrogen, oxygen, neon, argon, krypton, xenon, and radon.
Hydrogen is the lightess, but most common element in the galaxy. It can be used to make balloons rise, be burned to give off heat, or burned to give engine thrust.
It is colorless.
Nitrogen is a colorless, odorless, and tasteless nontoxic gas.
Helium is a gas used to inflate lighter than air balloons.
nitrogen
Helium is a colorless odorless, tasteless, gas. It is the second most abundant element in the universe, an accounts for 24% of the elemental mass of our galaxy.A chemical element with 2 protons and 2 neutrons. It is used to fill balloons, and occasionally to protect old documents.
Oxygen
Xenon is a colorless gas.
krypton
Yes, helium is an example of a gas. It is a colorless and odorless gas that is lighter than air. It is commonly used to fill balloons and in various scientific and industrial applications.
The element used is called neon.The element used is called neon.
Neon is a colorless, transparent gas.
HELIUM
element
They are filled by Hydrogen gas.