Polar & Non-Polar Bonds

Which are non-polar?

Covalent bonds in diatomic gases

Why are they non-polar?

The atoms have equal electronegativities and so the electrons are equally attracted to both nuclei.

What do some elements, like Carbon and hydrogen, have?

Similar electronegativities, so bonds between them are essentially non-polar.

What happens in a covalent bond between 2 atoms of different electronegativities?

The bonding elections are pulled towards the more electronegative atom and makes it polar

What does delta + mean?

Slightly positive

What does delta - mean?

Slightly negative

What happens in a polar bond?

The difference in electronegativity between the 2 atoms causer a permanent dipole.

What's a dipole?

A difference in charge between the 2 atoms caused by a shift in electron density in the bond.