Question

why is helium filled in ballons ?​

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.

Answer 2

Answer:

Please mark my answer as brainlist

Explanation:

If you buy a balloon from a vendor, it's probably filled with helium. ... 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.