CHM 233 Lecture Notes - Lecture 3: Octet Rule, Chemical Formula, Formal Charge
Document Summary
Chm233 lecture #3: chapter 1: remembering general chemistry electronic structure and. This table shows a pattern to use instead of the formal charge calculations. Neutral state is known from the lewis structure for the element: unpaired electrons represent the number of bonds typically made (valence e-) Molecules that have the same electronic configuration are isoelectronic. Molecules that have the same molecular formula are isomers: iso same, mer unit. These are different molecules regardless of the chemical formula. Groups 1, 2; 3 too few electrons: some ions as well. Periods 1; 2 elements cannot have expanded octets: because second energy shells do not have d" orbitals, these elements are usually involved in/with organic molecules. Periods 3, 4, 5, 6; 7 too many electrons: may have expanded octets. Carbon has a formal charge of +1 (carbon cation) is neutral because of its normal bonding patterns (ch3)2so (4+3)2+6+6. Oxygen-sulfur double bond is created to make the molecule neutral.
