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3.4 Covalent Bonds and Lewis Structures
www.columbia.edu•Oxygen has 4 electrons in covalent bonds. •Assign 2 of these 4 electrons to O. •Oxygen has 2 unshared pairs. Assign all 4 of these electrons to O. •Therefore, the total number of electrons assigned to O is 2 + 4 = 6. Formal charge of O
CHAPTER 2 Chemistry of Life - Weebly
flemingbio.weebly.com2.1 ASSESSMENT Connecting CONCEPTS ONLINE QUIZ ClassZone.com FIGURE 2.4 COVALENT BONDS A carbon atom needs four electrons to fill its outer energy level. An oxygen atom needs two electrons to fill its outer energy level.