Why oxygen molecule is diatomic whereas sulphur molecules is octa atomic?

Sulphur molecule is

Oxygen molecule is paramagnetic because

What is catenation ? Explain why oxygen is diatomic, while sulfur is octa-atomic, S_g .

What is the atomicity of Sulphur molecule.

A diatomic molecules has

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.

Atoms & molecule

In DNA the oxygen atom is lost from the pentose sugar molecule at this carbon

Oxygen molecule shows the property of :

Why do halogens exist as diatomic molecules ?