Answer: Atomic number 16 is sulfur (S). It has 6 valence electrons and needs two more to complete it's outer shell to 8 electrons. It will steal those electrons from elements theat need to lose electrons to achieve a full valence shell (lower energy shell).
Explanation: Sulfur's valence shell is 3s^2_3p^4. It needs two more electrons to fill the 3p orbital to 6 electrons. This is a lower energy state and so sulfur will remove, or share, electrrons from elements that benefit from losing an electron to achieve a lower energy state.
