MCELLBI C61 Chapter Notes - Chapter 3: Ribose, Quaternary Ammonium Cation, Glycogen
19 Nov 2016
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Document Summary
Chemistry/alchemy: chemistry is the scientific endeavor concerned with the nature of matter and its transformations. Alchemy was concerned with these things but also with investigation of the psyche--transformation of self and of human psychological condition- One of the greatest achievements of human intellect. Elemental composition of the human body: water = h2o. 18. 5%, hydrogen = 9. 5%, nitrogen = 3. 2%, calcium = 1. 5%, phosphorus = 0. 4%, sulfur = If by dry body weight, carbon would be 1st. Hydrogen still most abundant in terms of atom number. ions: cations, anions: ions are charged atoms, formed when atoms gain or lose electrons. Atom"s position on periodic table tells whether it"s likely to gain or lose electrons. Positive = lost e-, negative = gained e-. Molecules, covalent chemical bonds: molecule is a stable configuration of atoms held together in a particular geometric shape by the sharing of electrons between atoms. Organic molecules, hydrocarbons: molecules produced by life, compound largely composed of carbons and hydrogens.
