[Ann1234]

Hello 

 I have this problem:

Estimate the dipole moments for the individual bonds in BeH2

I know dipole moment = charge x distance and that:

1.602 x10^-19 C = "1" charge
 I also know how to convert to Debye.

However, I don't understand how to calculate the distance between nucleous and the charge between them. I used the atomic radious and I did:

distance = ar Be + ar H with data from my periodic table but I am not sure if that is correct.

And I have no idea on how to calculate the "charge".

can someone help me to get through this problem? thanks