Question

​​​Why does Sulphur exist as s8 usually, not s2? Won't it be much hassle free and involve only two atoms?
Please may I simplified answer as we have not studied much about sigma or pi

Answer 1

it was due to the large sulfur atom.

The larger atoms of the third row and heavier are not very good at making multiple bonds. Oxygen will form O2, with a double bond between the O atoms. Sulfur is not quite as "happy" doing this (i.e. the double bond between S atoms is not quite as favorable). So, elemental sulfur prefers to assemble itself into S8 rings with only single bonds between the S atoms.