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Unformatted text preview: CHEM 1570
Spring 2010 Filling Atomic Orbitals
Fill from low to higher energy Each orbital can have 2 electrons (Pauli Exclusion Principle) Electrons fill separate orbitals of equivalent energy before pairing (Hund's Rule) Lewis or Kekule Structures 1. find the # of valence electrons (adjust for charge) 2. connect atoms / single covalent bonds / least EN atom in center (not H) 3. subtract bonding electrons 4. distribute rest of electrons as lone pairs 5. draw multiple bonds to achieve octets ...
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