BSCI-1510 Lecture Notes - Lecture 2: Solvation Shell, Electronegativity, Heat Sink
1 Sep 2017
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Lecture 2 notes (an elementary chemical review for life processes) We focus mainly on the microscopic realm during the first semester. Micrometers = 10^-6 m. microns are used for most cells. Nanometers = 10^-9 m. often referred to as an a, or an angstrom. Life processes use mostly: h, c, and o, among others. The earth"s crust is made largely of oxygen and silicon, among others. Inner cells: first orbital holds up to two electrons, the next one holds up to 8. Carbon, with 4 electrons in outer shell, is unstable. Sharing electrons with partners cause movement into a lower, more stable energy state. Carbon and hydrogen come together and form a strong covalent bond. The more covalent bonds mean more electrons are being shared. First law of thermodynamics tells us that energy is conserved. Calories (with a capital c) is really just kcal. This can be ionic bonds, hydrogen bonds, or van der waals interactions.
