BIO 202 Study Guide - Comprehensive Final Exam Guide - Van, Unified Atomic Mass Unit, Ion

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20 Nov 2018
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Bio 202: chemical context of life, matter. Isotopes- atoms of the same element with different mass. Proton- positively charged subatomic particle: 1 amu = 1 dalton = 1. 7x10-24g, neutron- non charged subatomic particle, 1 amu = 1 dalton = 1. 7x10-24g. Electron -negatively charged subatomic particle: atomic # = # of protons, atomic mass # = protons + neutrons, on periodic table it"s a weighted average of all naturally occurring isotopes, molecules + bonds. Electronegativity-attraction of electrons to an atom: same en nonpolar, different en polar. Ion- atom has more or less e- than it should. Polarity attracts other molecules to it which causes adhesion. 23 amu 1 mole=23g: in compounds, molar mass= mass of component atoms, ex. 23g and 35g 1 mole= 58g: acid- a substance that increases the hydrogen ion concentration of a solution (ph<7, weak acids- partly dissociate; reversible reaction. Et cl ethyl chloride chloro ethane ethyl group. C hz c hz c hz c hz.

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