Why sulphur is not diatomic like oxygen?

The catenating tendency for sulphur is more than that of oxygen . Why ?

Why does argon not form diatomic molecules like oxygen and nitrogen? Write two uses of argon.

What happens when sulphur dioxide reacts with oxygen in the presence of vanadium (V) oxide?

Hydrogen sulphide contains 94.11% of sulphur, water contains 11.11% of hydrogen and sulphur dioxide contain 50% oxygen. Show that these result are in agreement with the law of reciprocal proportion.

Why is sulphuric acid not used during the reaction of alcohols with KI?

0.4 g hydrogen combines with the 3.2 g oxygen to produce water. Hydrogen sulphide is produced by combination of 0.25 g hydrogen and 4.0g sulphur. 1g of sulphur combines with 1 g of oxygen show that the results are in accordance with the law of reciprocal proportion.