Applications are restricted to small systems like the hydrogen molecule.

*Many people think it should have been a hydrogen molecule, but this is against the observed facts.

Therefore, hydrogen molecules effuse four times faster than those of oxygen.

For example, the hydrogen molecule, because of its light mass, gets a high translational energy.

These editing steps require pushing buttons the size of hydrogen molecules, but it's otherwise not especially difficult.

Not those chips you toss around like spare hydrogen molecules.

The hydrogen molecule is so small that it would escape through the cracks in the pipes used for natural gas.

But there are an awful lot of hydrogen molecules in a lungful, here.

Some would grab an electron, coming through as a hydrogen molecule.

But we didn't find one extra hydrogen molecule above what is more or less normal for deep space.