1,106,951 Pages
Welcome! Enter your question below. Please use words like "Who, What, Where, When, Why, How, etc..." in your question. Nothing to ask? Click here for a random, un-answered question.

Yes, Helium is lighter than air. Helium is element #2, whereas oxygen is #8. Oxygen has an atomic mass of 16, and helium has a mass of 4, so helium is 4 times lighter than air. So helium balloons float.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.