It's important to note that sulfur can exist in different forms:
* Elemental sulfur is found in its pure form, often as a yellow solid.
* Sulfides are compounds where sulfur is bonded to one or more metals (like iron sulfide, FeS).
* Sulfates are compounds where sulfur is bonded to oxygen and a metal (like calcium sulfate, CaSO4).
While sulfur can be part of many different compounds, the basic building block of all sulfur is the sulfur atom.
