Write a short note on the structure of sulphur.

Explain the following property of group 16 elements:

Allotropy

Match the following

The correct match is:

Statement I : $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.

Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

In the light of the above statements, choose the correct answer from the options given below:

Sulphur can form ${\mathrm{S}}_2, {\mathrm{S}}_6, {\mathrm{S}}_8$ and ${\mathrm{S}}_{\mathrm{n}}$ but oxygen forms only ${\mathrm{O}}_2$ and ${\mathrm{O}}_3.$ This is due to