Would a helium balloon float in a vacuum?

In this video, I test whether or not a helium balloon will float in a vacuum chamber. read more

No, a helium balloon floats because helium is lighter than ordinary air. Air, then, sinks to the bottom, “pushing” the helium balloon up. Without air (or any particles) in the vacuum, there is nothing heavier than the helium in the balloon. So the balloon itself sinks. read more

Generally, a balloon has to be several liters in size before the 1-gram-per-liter weight difference of helium vs. air is enough to overcome the weight of the balloon itself and float. If you could somehow fill a 1-liter bottle with a vacuum, it would float even better. read more

(I apologize in advance for my lack of knowledge on this matter) Assuming that the balloon does not collapse, of course. read more