BIO152H5 Study Guide - Final Guide: Ionic Bonding, Ionic Compound, Hydrogen Bond

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26 May 2016
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Bio 152 fall 2014 final exam study guide: chapters 2-5. Chapter 2-5: water, carbon, macromolecules: describe how living organisms are subject to basic laws of physics and chemistry, and give examples, compare and contrast covalent bonds, ionic bonds, and hydrogen bonds. Covalent bonds: intermolecular: the sharing of valence electrons by two atoms. Ionic bonds: intermolecular: occur when atoms strip electrons from their bonding partners, after the transfer of an electron, both atoms have charges. A charged atom or molecule is called an ion: a cation is a positively charged ion. An anion is a negatively charged ion: an ionic bond is an attraction between an anion and a cation. Non-polar covalent bonds atoms share electrons equally. Polar covalent bonds one atom is more electronegative and do not share electrons equally: describe how polar covalent bonds in water molecules result in hydrogen bonding. Water molecule is shaped like a wide v with its two hydrogen atoms joined by single covalent bonds.

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