CHEM 51A Chapter 1.4,1.5: Formal Charges & Induction and Polar Covalent Bonds
Document Summary
Is associated with any atom that does not exhibit the appropriate number of valence electrons. Consider the nitrogen atom in the compound below and determine if it has a formal charge: Determining the appropriate number of valence electrons for a nitrogen atom. Nitrogen is in group 5a (cid:159) have 5 valence e-s. Determine the actual number of valence e-s in this case. Count how many valence electrons are exhibited by the nitrogen atom in this particular example: In this case, the n atom exhibits only 4 valence electrons. It is missing 1 e-, so it must bear a positive charge. 1. 13 identify any formal charges in the compounds below: 1. 14 draw a lewis structure for each of the following ions; in each case, indicate which atom possesses the formal charge: 1. 41 draw a lewis structure of the anion and determine its geometry. Chemist classify bonds into 3 categories: covalent electrons are considered to be equally shared, polar covalent.
