Question

Indicate the type of crystal Kr would form upon solidification:

a) amorphous glass
b) ionic
c) network covalent
d) molecular or atomic
e) metallic

Answer 1

Krypton forms a molecular (or atomic) crystalline solid upon solidification, as its atoms are held together by weak London dispersion forces that are characteristic of this type of solid.

Step-by-step explanation:

The type of crystalline solid that krypton (Kr) would form upon solidification is a molecular or atomic crystal. Krypton is a noble gas and, when solidified, its atoms are held together by weak London dispersion forces (or van der Waals forces). These forces are characteristic of molecular or atomic crystals, which consist of molecules or atoms at their lattice points with intermolecular forces holding them together. Hence, when krypton solidifies, it forms a molecular (or atomic) crystalline solid rather than other types of crystalline solids like metallic, network covalent, or ionic solids.