What is helium diatomic?

Helium diatomic is a theoretical molecule composed of two helium atoms that are bonded together. However, the diatomic form of helium is extremely unstable and has never been observed in nature, neither in the gas phase nor in the solid phase. It is a non-polar molecule with a symmetrical shape, with a bond length of approximately 60 picometers and a dissociation energy of 1.6 eV. The existence of helium diatomic is predicted by quantum mechanics, but its fragility and instability make it difficult to study experimentally.