The Lewis structure for BeH molecule is as follows:
H:Be:H :- There is no lone pair at the central atom (Be) and there are two bond pairs. Hence, BeH2 , is of the type AB2 . It has a linear structure.
Dipole moments of each Be – H bond are equal and opposite in direction. Therefore, they nullify each other. Hence, BeH2 has a net zero dipole moment.