Question

why does a balloon filled with hydrogen or helium gas rise up​

Answer 1

Answer:

This is because helium is less dense. Because helium is lighter that air, a helium balloon rises, just as an air bubble rises in more dense water. Hydrogen is another gas lighter than air; it's even lighter than helium. ... This is because hydrogen burns very easily.

Answer 2

Hydrogen filled balloons generally rise up in air.This is because hydrogen is less dense and its weight is also less than the air.The one filled with carbon dioxide generally sinks down as it denser than the air and due to its heavy weight,it cannot rise up to the ceiling.

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