CHEM 10171 Lecture Notes - Lecture 1: Van Der Waals Force, Exothermic Reaction, Reagent
25 Apr 2017
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Macroscopic: chemical change, acid base reactions, chemical equilibrium, thermodynamics. Nucleus: small (~10^-14m) heavy; almost all the mass. Protons: number in the nucleus = z, mass = 1. 67^-27kg = 1 amu, positive charge. Neutrons: number = n, mass = 1 amu, no charge. Electrons: charge = -1e; neutral atoms has z electrons, mass = 9. 11^-31kg (. 000054 amu), spread out over ~ 10e-10 m. Nuclei are tightly bound and obdurate; they are not affected by chemical processes, electrons are squishy. Opp charged particle get closer = more negative energy = more stable. Charge on nucleus = number of protons z; determines the chemical nature of an atom = which element is it. Ex; z = 17 n = 18 ; 35cl. Self propagating oscillations in electric & magnetic fields. Speed = lambda * v (c = speed of light = 3e8) Lambda: . 1 -10 m (radio), 1 - 30 um (infrared), 400 - 800 nm (visible),
