Question

What is the formula of the hydride formed by Krypton?

Answer 1

Hint : In basic terms, the anion of hydrogen is referred to as hydride. It's a chemical compound with nucleophilic, simple, or reducing properties due to the hydrogen atoms.

Complete Step By Step Answer:
With hydrogen, krypton does not form covalent compounds. It does, however, form a "van der Waals compound" called krypton hydride with the formula ${\text{Kr(}}{{\text{H}}_{\text{2}}}{{\text{)}}_{\text{4}}}$ at ${\text{2}}{{\text{5}}^{\text{0}}}{\text{C}}$ and pressures greater than $5.3GPa$ $(52000\,\,atm)$. Crystals of krypton hydride (${\text{Kr(}}{{\text{H}}_{\text{2}}}{{\text{)}}_{\text{4}}}$) can be grown at pressures greater than $5.3GPa$. They have a face-centered cubic structure with krypton octahedra surrounded by hydrogen molecules that are randomly oriented. The hydrogen atoms exist in the form of hydrogen molecules, which are only drawn to the krypton atoms by van der Waals forces. The Kr atoms form octahedra (green) and these octahedra are arranged in a face-centered structure. Between the octahedra, the hydrogen molecules (grey) are uniformly oriented in four different forms of "holes". Krypton is both a noble gas and a nonmetal chemical element. The noble gases were thought to be incapable of forming compounds due to their absolute valence shell of electrons, which made them chemically stable and unreactive. Since all noble gases (except helium, which has no p sublevel) have fulls and p-outer electron shells, they are difficult to combine chemically.

Note :
A weakly bound complex of atoms or molecules held together by intermolecular attractions such as Van der Waals forces or hydrogen bonds is known as a Van der Waals molecule. Krypton hydride is a van der Waals compound.