Please explain dipole moments to me!?

Question

I know about electronegativities of elements, but I don't know what they have to do with dipole moments. Also, why do some molecules have no dipole moments?

Answer 1

Dipoles are magnets - dipole (northpole southpole + -)

same idea, just different scale, different magnitude.

If you understand the electronegativity of the elements, then when you join two electronegative elements this is what happens:

A-->B (--> is not the reaction signal it is the force symbol)

If B is less electronegative than A this is what the force diagram will look like (remember the arrow gets to + sign).

If A is less electronegative than B this is what you get:

A<--B

The least electronegative element ends up with a partial + charge and the more electronegative element ends up with a partial - charge.

Answer 2

http://en.wikipedia.org/wiki/Dipole
Go to this page you can get abundant information on dipole moment
hope this will help