Electrons are placed around each atom so that the octet rule is obeyed. Also note the resonance structures that must be accounted for due to oxygen have either a single or double bonds. Therefore, P = 6n + 2 – V = 6 * 4 + 2 – 26  = 0   There are no  π electrons in SO3-2. from  http://treefrog.fullerton.edu/chem/LS/SO3neg2LS.html. Since S is a third row element can accommodate more than 8 valence electrons. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures). This chemistry blog is aimed mainly at senior high school students or first year university students. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures). google_ad_slot = "2147476616"; Let us consider the case of the sulfite ion. Lewis Dot of the Sulfite Ion. Sulfite ion is one of the oxyanion of sulfur. Sulfur is at +4 oxidation state in SO 32-. SO 3 2-Back: 70 More Lewis Dot Structures. Educ., 68, 19-23 (1991), A.B.P. google_ad_height = 60; Step 2: Calculate the # of electrons in π bonds (pi bonds, multiple bonds) using  formula (1): Where n in this case is 4 since SO3-2 consists of four atoms. The central atom is the sulfur atom. A simple method for writing Lewis Structures is given in a previous article entitled “Lewis Structures and the Octet Rule”. Sulfites or sulphites are compounds that contain the sulfite ion (or the sulfate(IV) ion, from its correct systematic name), SO 3. However, chemistry topics of general interest are going to be included. S does not follow the octet rule. google_ad_client = "pub-0644478549845373"; In lewis structure of sulfate ion, there should be charges on several atoms due to -2 charge. It will hold more than 8 electrons. Lewis Dot Structure of the sulfite ion SO 3-2 A simple method for writing Lewis Structures is given in a previous article entitled “ Lewis Structures and the Octet Rule”. It will hold more than 8 electrons. The sulfite ion is the conjugate base of bisulfite. Powered by, Physical & Theoretical Chemistry - Lewis Structures - Theory & Examples, Sitemap - Table of Contents (Lewis Electron Dot Structures), Physical & Theoretical Chemistry - Lewis Structures, Analytical Chemistry - Acid & Base Equilibria, Analytical Chemistry - Gas Chromatography / Mass Spectrometry, Analytical Chemistry - Liquid Chromatography, Analytical Chemistry - Statistical Analysis of Experimental Data, Chemical News & Interesting - Periodic Table - Elements, Organic Chemistry - Nucleophilic Substitution Reactions, Physical & Theoretical Chemistry - Chemical Kinetics, Physical & Theoretical Chemistry - Computational Chemistry, Physical & Theoretical Chemistry - Electrochemistry, Physical & Theoretical Chemistry - Properties of Solutions, Physical & Theoretical Chemistry - Thermochemistry, Theoretical Chemistry - Lewis Electron Dot Structures, Theoretical Chemistry - Lewis Electron Dot Structures and Reactivity, E. C. McGoran, J. Chem. google_ad_width = 468; Therefore, the structure in Step 1 is a plausible Lewis structure of SO3-2. Elements in the first 2 periods of the Periodic Table do not have access to the d sublevel and must adhere to the octet (or duet H and He) rule. SO 42-.Lewis Structure (Sulfate ion) Lewis structure of sulfate ion is drawn in this tutorial step by step. Sulfur having valence electrons in the 3rd energy level, will also have access to the 3d sublevel, thus allowing for more than 8 electrons. Total valence electrons concept is used to draw the lewis structure of SO 42-. Educ., 49, 819-821, (1972). Where V = (6 + 6 + 6 + 6 ) – (-2) = 26 , V is the number of valence electrons of the ion. Although its acid (sulfurous acid) is elusive, its salts are widely used. The chemical formula is SO3-2 . //-->. Sulfur having valence electrons in the 3rd energy level, will also have access to the 3d sublevel, thus allowing for more than 8 electrons.