BIOL 1020 Lecture Notes - Lecture 4: Covalent Bond, Ionic Bonding, Octet Rule
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BIOL 1020 Full Course Notes
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Document Summary
The molecular mass is the sum of the atomic masses in a molecule. Chemical bonds hold molecules together and store energy. Chemical bonds are based on filling valence shells. Describes the affinity and element has for electrons. 1 pair is a single covalent bond. Nonpolar covalent bond - electrons are equally shared. Polar covalent bond - electrons are unequally shared. When one nucleus holds a stronger attraction on the electron pair. Occurs between ions -- atoms that have gained or lost one electron. Formed when a hydrogen interacts with an electronegative atom (n,o,f) Weak alone, but strong when numerous (dna) Oxidation - reduction reactions are common in biology.
