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.
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the structue of BeH2
H - Be - H
The bond are polar but the dipole moment e]which is developed towards one hydrogen is cancelled by other and so it dipole moment become zero
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The Lewis structure for BeH2 is as follows:
There is no lone pair at the central atom (Be) and there are two bond pair. It has a linear structure. Dipole moments of each H–Be bond are equal and are in opposite directions.
Therefore, they nullify each other and the BeH2 molecule has zero dipole moment.
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