Which orbital is non directional?
They are non directional because they are spherical in shape and probability of finding electrons at a particular distance from the nucleus is same in all directions.
Compare sigma bond and pi bond.
Sigma bond is stronger than Pi bond.
Following are the major differences between pi bond and sigma bond:
Sigma Bond | Pi Bond |
It is formed due to the head-on overlapping of combining orbitals. | It is formed due to the lateral or sideways overlapping of combining orbitals. |
It is stronger than pi bond. | It is weaker than sigma bond. |
Sigma bond can form independently. | Pi bond is formed only after the formation of sigma bond. |
Free rotation is possible. | Free rotation is not possible. |