Here's how to figure that out:

* Atomic Number: Sulfur's atomic number is 16, meaning it has 16 protons and 16 electrons.

* Electron Configuration: The electron configuration for sulfur is 1s² 2s² 2p⁶ 3s² 3p⁴.

* Valence Electrons: The outermost energy level is the 3rd energy level, which contains 6 electrons (2 in the 3s orbital and 4 in the 3p orbitals).