Oxygen exists as a gas, while sulphur exists as a solid Why ?

Statement-1 : At room temperature oxygen exists as a diatomic gas, where as sulphur exists as solid. Statement-2 : The catenated -O-O-O- chains are less stable as compared to O=O molecule.

Nitrogen is a gas, while other members of group 15 are solids. Why ?

The solid PCl_5 exists as

Some metals exist as gases.

Why is dioxygen a gas but sulphur a solid?

State true or false Oxygen is a gas but sulphur a solid.

Why boron halides do not exists as a dimer. While AlCl_(3) exists as Al_(2)Cl_(6) ?

Why do some substance exist as solids?

Why carbon exists as the hardest crystalline solid, though it is a non metal?

Nitrogen exists as diatomic molecule and phosphorus as P_(4) . Why ?