[blazingrifath]

guys,, i have a doubt.. atom size is generally in angstroms and in the allotrope of sulphur [S8], there would be 8 atoms, which correspond to a size in nanometres.. so would that show confinement properties and can we call it a nanoparticle?

[AWK]

S8 form a ring, not a chain and its size do not exceeds 1 nm.

[vex]

In any case, you're referring to the size of the molecule, which isn't what determines whether a particle is a nanoparticle or not. A crystalline solid is a network of repeating unit cells, which in the case of S₈ can be thought of as individual molecules. The particle size corresponds to the number of these repeating units that are connected before the particle is terminated. So even though the S₈ subunit is very small, the particle can still be enormous (as far as particle sizes go, that is).