Eric Seow (8)

Sulfur Trioxide is the chemical compound with the formula SO_{3.   It is the primary agent of acid rain.}

_Formation

_{Sulfur Trioxide- 3 Oxygen atoms + 1 Sulfur atom}

In terms of electron-counting formalisms, the three oxygen atoms are in the -2 oxidation state and the sulfur atom has an oxidation state of +6, a formal charge of 0, and is surrounded by 6 electron pairs. 

_{Constituent Elements}

 The most important use of oxygen is for breathing. Animals require oxygen in their air (or water) to live.

Another use for oxygen is for oxidation reactions -- the most obvious
example is burning.  Fires require oxygen to burn. 

Bonding 

Sulfur trioxide is formed from a covalent bond.  

Dot and cross diagram