BIOL2000 Lecture Notes - Lecture 2: Chemical Bond, Ionic Bonding, Electronegativity

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27 Jan 2016
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Four elements that are 99% within the human body: carbon, nitrogen, hydrogen, and oxygen. Cells contain four major families of small organic compunds. Sugars, fatty acids, amino acids, and nucleotides. Sugars = energy for cells and subunits of energy storing (an structural) polysaccharides. Fatty acids = components of cell membranes and source of energy. Nucleotides = subunits of rna & dna. Monomers (two sugars) are condensed to form a bond to generate water: covalent bonds. Covalent bonds are stable and are very strong. Stable of chemically unreactive when the outer shell of electrons. Individual components of molecule are completely full electron (ionic bond: if not stable, they will try and share an electron or take an. Electronegativity = a measure of tendency of an atom to attract a bonding pair of electrons. Increases as you go up/ further to the right of periodic table.

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