Question

how is helium heavier than hydrogen?

Even the Hindenburg ( the famous crash) used hydrogen and got a good spanking by mother earth ​

Answer 1

Answer:

helium is almost twice as dense as hydrogen

Explanation:

The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy as follows: Thus helium is almost twice as dense as hydrogen. However, buoyancy depends upon the difference of the densities (ρgas) − (ρair) rather than upon their ratios.

Answer 2

Answer:

But helium is lighter that air. ... 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.