Physical Properties of Group 16 Element

The number of lone pairs and $\mathrm{S}-\mathrm{S}$ bonds, in ${\mathrm{S}}_8$ molecule, respectively

There is a large difference between the melting point and boiling point of oxygen and sulphur. Give reason.

The melting and boiling points of  _____ with an increase in atomic number down the group($16$).

Give reasons for the less boiling and melting point of $\mathrm{Po} \mathrm{than} \mathrm{Te}$.

Give reasons for regular increase in melting and boiling point down the group up to tellurium in $16$ group elements.

The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of their atomicity.

The number of allotropes of oxygen is____.