Bond Lengths [ENDORSED]

[Peter Nguyen 2I]

Why do single bonds have longer bond lengths than double bonds?

[505194972 3k]

I believe the reason is because with two bonds mean a stronger hold between the two atoms so they are pulled closer together. while a single bond is held more loosely between the two atoms and would not be held as tightly making it longer. hopefully that helps.

[Fayez Kanj]

hello!

Single bonds are weaker than double bonds (attraction between 2 electrons and the nucleus vs attraction of 4 electrons and the nucleus which is stronger). Since they are weaker, the electrons are less tightly pulled towards the atoms (they are further apart in space) and thus, have a longer length.

This is the trend:
stronger bond = shorter bond
weaker bond = longer bond
single bond - triple bond = weakest - strongest

Hope this helps :)