# How do noble gases bond with themselves?

Noble gases have full electron shells, which virtually blocks any other element from bonding with it. However, I've heard about cases where they bond to each other - for example, helium can apparently form a dimer $\ce{He2}$.

How is this possible?

• – Mithoron Nov 6 '17 at 14:40

An addendum regarding noble gas compounds in general: the first noble gas compound synthesised was $\ce{XePtF6}$. When $\ce{[O2+][PtF6-]}$ was discovered by the oxidation of dioxygen with platinum hexafluoride, it was hypothesised that $\ce{XePtF6}$ could be made via the oxidation of xenon with platinum hexafluoride, because of the similar ionisation energies of dioxygen and xenon.