* Sulfur as an element: Sulfur (S) is an element. Elements are made up of only one type of atom. So, a single sulfur atom is the smallest unit of sulfur.

* Sulfur in a molecule: Sulfur can form molecules with itself. The most common form is S8 (sulfur octasulfur), which means 8 sulfur atoms are bonded together.

Therefore, there's no single answer to your question. It depends on what form of sulfur you're talking about:

* Single sulfur atom: 1 atom

* Sulfur octasulfur (S8): 8 atoms

Let me know if you'd like to know more about sulfur!