Hint:The bond length of any compound present between two atoms, is the distance between the nucleus of the two atoms involved.
The bond strength of an atom is higher if the energy required to break that bond is high, and similarly the lower bond strength signifies lower energy for the breakage of bond.
Complete step-by-step answer:The bond length is inversely proportional to the bond strength, in other words, longer the bond length less strong will be the bond, and shorter the bond length stronger will be the bond. In case of the shorter bonds, the atoms which are attached to one another through the bond tends to be more closer as compared to the other atoms which have longer bonds and so those bonds are weaker.
With the increase in closeness between the atoms in a molecule, the bond would become more tightly packed and so it will require higher energy to break these bonds. If the number of electrons which are involved in the bond increases, the bond strength also increases and the gap between them decreases. For instance, the sigma bond between two atoms is longer and weaker than pi bonds between the same atoms.
Note:The bond length and bond strength have direct relation with each other, as they are inversely proportional, meaning, the increase in bond length would result in decrease in bond strength and vice versa.
This is because with increase in bond length the distance between the atoms would increase and so it will become easier to break the bond with lesser energy, while on the other hand shorter bonds would require higher energy and so are stronger.
