Bond Parameters - Bond Order, Angle, Length, and Energy - Practice Questions & MCQ

Bond length

It is the distance between the nuclei of two bonded atoms when the lowest potential energy between the atoms is achieved.

Bond angle

It is the angle between any two covalent bonds that share a common atom as shown in figure.

Bond distances (lengths) and angles are shown for the formaldehyde molecule, H₂CO.

Bond energy

It is the energy required to break one mole of bonds between two atoms in a gaseous state. For example, the bond enthalpy of H-H bond is  435.8 kJ/mol.

$\mathrm{H}_2(\mathrm{~g}) \rightarrow \mathrm{H}(\mathrm{g})+\mathrm{H}(\mathrm{g}): \Delta_{\mathrm{a}} \mathrm{H}^{\prime}=435.8 \mathrm{kJmol}^{-1}$

Bond Strength

It is the strength by which the bonded atoms are held together in a molecule. It is measured in terms of the bond energy, in other words, it is the amount of energy required to break the bond.