BIOL 1107 1nd Edition Lecture 5 Outline of Last Lecture I N A Outline of Current Lecture I Bonding II Why do you need water Current Lecture I Bonding Equal sharing of electrons Nonpolar Covalent Bonds Atoms have no charge Transfer of electrons Polar Covalent Bonds Atoms have partial charge Ionic Bonds Atoms have full charge In class diagram Chemical Bond attractions that bind atoms together Hydrogen Bond a weak attraction between two molecules Electronegativity how strong the electron pull is ability to attract electrons Polarity a difference across something Polar Covalent Bond a covalent bond in which electrons are shared unequally between atoms Nonpolar Covalent Bond a covalent bond in which electrons are equally shared between atoms Ionic Bond a chemical bond that is formed when an electron is completely transferred from one atom to another so that the atoms remain associated due to their opposite electric charges II Why do we need water These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute a We need water because of its polarity Water enables us to preform work by allowing cells to create and move ions as well as creating action potentials currents
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