Arrange O2, O3, H2O2 molecules in a row to increase the bond length between oxygen atoms. Explain your choice.

Oxygen (O2) O = O has the shortest bond length between atoms. This is due to the fact that oxygen atoms are linked by a double bond (two unpaired electrons of one atom combine with two unpaired electrons of the other).

In the ozone (O3) molecule, there is a kind of “one and a half” bond between the oxygen atoms. Oh … Oh … Oh. It’s a little weaker and the link length is longer.

In a molecule of hydrogen peroxide (H2O2), the bond between oxygen atoms is single. H – O – O – H. The second unpaired electron of the oxygen atom is spent on creating a bond with the hydrogen atom. This bond is the least strong. The distance between atoms is greater.

Conclusion: in the series of molecules O2, O3, H2O2 – the length of covalent bonds between oxygen atoms increases.