BIO-0013 Chapter Notes - Chapter 2: Ionic Bonding, Chemical Evolution, Heat Capacity

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Pattern- in addition to small molecules, complex carbon-containing substances exist and are required for life. Process- simple chemical compounds combined to form more complex carbon- containing substances. Four types of atoms make up 96% matter- h, c, n, o. Covalent bonding: strong attraction in which 2 atoms share 1 or more e- Electronegativity: some atoms hold electrons in covalent bonds more tightly. Ionic bonding: electrons completely transferred not shared. Chapter 2. 2: properties of water + early oceans. Water is a solvent- agent for dissolving/getting substances into solution. Substances more likely to react when solutes have direct contact. Hydrophobic: substances that do not interact with water- nonpolar. Hydrophobic interactions: nonpolar molecules caged together by surrounding water. Adhesion: partial + on h2o partial - on glassupward pull. Cohesion: h2o h2onet pull lateral + downward. Surface tension: attraction between molecules at surface. Strong h bonds are hard to break. Molecules formed in ocean protected from energy.

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