Lecture Notes for BIOL 1441 - CELL AND MOLECULAR BIOLOGY with Frederick at Texas - Arlington (UTA)

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Material Type:Note
University:University of Texas - Arlington
Term:Fall 2010
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Important Concepts in Biology What is the difference between polar and nonpolar covalent bonds? In order to answer this question, begin with the basics: what is a covalent bond? Two atoms in a covalent bond share electrons. Remember electrons like to be in pairs. Each atom contributes an electron so there are two- which both atoms share. The electrons will spin around one atom, then the other. Electrons are always in constant movement- meaning they never stop orbiting the atoms. The electrons can spin around the atoms two ways: 1) spending more time around one atom than the other or 2) spending the same amount of time around each atom. Scenario 1 describes a polar covalent bond. Scenario 2 describes a nonpolar bond. Polar covalent bonds result from atoms sharing the electrons POLAR COVALENT BONDS unequally . This depends on each atom?s electronegativity value. Electronegativity is a measure of an atom's ability to draw its bonding electrons to itself. Eac...
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