ENSC 1003 Study Guide - Midterm Guide: Lipid Bilayer, Cell Nucleus, Thermodynamics
25 Feb 2017
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Scienti c study of relationship btw organisms & their env"t: how matter & energy= exchanged btw organisms & surroundings. Everything that has mass & take up space. Matters can neither be created nor destroyed, but it can be changed. Substances that cannot be broken down into simpler forms by ordinary chemical reaction: composing matters. Smallest particles exhibiting characteristics of the elements: composing elements, protons (+): in nucleus, neutrons: in nucleus, electrons (-): orbit nucleus. Charged atoms (different # of neutrons than protons) Forms of same element w. equal # of protons but differing # of neutrons. Any 2+ atoms joined together by chemical bonds: bonds form as a result of sharing/ exchange of electrons among atoms, distinguished from ions by neutral charge. Forces (chemical energy) holding atoms together in molecules. Atoms w. opposite charge (ions) form a bond (+ and -) Atoms= unstable because outer rings of electrons= not lled up (share electrons & become stable)
