# which chemical element has the lowest boiling point? [closed]

which chemical element has the lowest boiling point?

Is it Helium(He) or is it Hydrogen(H)?

Hydrogen is lighter than Helium.

• Regardless of it is an element or a molecule,, helium has the lowest boiling point $(\pu{-269 ^\circ C})$. In comparison, hydrogen, which exists as a diatomic molecule, has the boiling point of $\pu{-253 ^\circ C}$. – Mathew Mahindaratne Jun 7 at 17:31

Helium has a stablest $1s$ orbital, which has somewhat lower energy. And, this makes it chemically inert towards other elements and to other Helium atoms, which is also the reason for its lowest boiling point.