Because it is incredibly flammable. Look up "Hindenburg".
Helium is used instead of hydrogen for balloons because it is non-flammable, whereas hydrogen is highly flammable. This reduces the safety risk associated with using hydrogen in balloons. Additionally, helium is more abundant in nature and does not react with other substances, making it a safer and more practical choice for filling balloons.
Hydrogen is the element commonly used in balloons that can be explosive when mixed with oxygen in the presence of a spark or flame.
Hydrogen is highly flammable and can easily explode. Helium is a more stable gas.
'Hot air' balloons don't use hydrogen. They use hot air. Balloons that use hydrogen are not referred to as 'hot air' balloons. The only balloons that can accurately be referred to as 'hot air' balloons are the members of the balloon population that derive their lift/buoyancy from the presence of hot air. Of course, if a balloon used no hot air, then it could freely be referred to as a 'hydrogen' balloon, a 'helium' balloon, a 'water' balloon, etc., depending in congruent harmony with the nature of whatever substance had been chosen with which to inflate it it in order to maintain its fulsome shape.
Hydrogen
Yes, hydrogen can be used in small balloons like party balloons. However, hydrogen is highly flammable and can pose a fire hazard if not handled properly. It is important to take precautions when using hydrogen in balloons to ensure safety.
Two of the gases that are used to fly balloons are Hydrogen and Helium. Helium is the preferred gas because Hydrogen is very explosive. The Hindenburg disaster was caused by the ignition of the Hydrogen gas that filled it.
Helium is a gas used to inflate lighter than air balloons.
Helium is used in balloons instead of hydrogen because it is non-flammable. Hydrogen is flammable and can be dangerous, while helium is inert and poses less of a fire risk. Additionally, helium is less dense than air, providing better lift for balloons.
Hydrogen is not used to inflate hot air balloons. Just regular air is used which is then heated to make the balloon more buoyant as hot air weighs less than cold air. Hence the name hot air balloons.
Helium is the most used gas for balloons; sometimes hot air and rarely hydrogen.
Helium is used in blimps and balloons. It is the second lightest element to hydrogen, which is not used because it is highly flammable.