The bond strength between two hydrogen atoms in molecular hydrogen H2 can be determined using the bond dissociation energy. The bond dissociation energy is the amount of energy required to break a bond between two atoms in a molecule, and it is a measure of the bond strength.For molecular hydrogen H2 , the bond dissociation energy is approximately 436 kJ/mol. This value indicates the strength of the bond between the two hydrogen atoms in the H2 molecule.