Explain why BeH 2 molecule has a zero-dipole moment although the Be–H bonds are polar.

Question

Philoid · Accepted Answer

The Lewis structure for BeH₂ is as follows:

H:Be:H

Here there is no lone pair at the central atom (Be) and there are two bond pairs on either side. Hence, BeH₂ is of the type AB₂ having linear structure.

Also, dipole moments of each H–Be bond are equal and are in opposite directions. Therefore, they nullify each other and hence, BeH₂ molecule has zero dipole moment.

Explain why BeH2 molecule has a zero-dipole moment although the Be–H bonds are polar.

Explain why BeH₂ molecule has a zero-dipole moment although the Be–H bonds are polar.