BIOL 1411 1st Edition Lecture 2Outline of Last Lecture I. What is Biology?a. Overarching Themesb. Characteristics of Living Thingsc. Hierarchy of Living Thingsd. Scientific MethodOutline of Current Lecture I. Atomic StructureII. BondingIII. Chemical ReactionsIV. WaterCurrent LectureI. Atomic StructureDalton- mass of a proton (1.7 x 10 -24 g)98% of Living things composed of: C,H,N,O,P,SIsotopes- same element, different number of neutronsRadioisotopes- unstable and spontaneously give off energy in form of alpha, beta, or gamma radiationII. BondingElectronegativity- attractive force an atomic nucleus exerts on electrons in a covalent bondVan der Waals forces- occur when 2 molecules are close in proximityIII. Chemical ReactionsAcids- release H+Bases- accepts H+Buffer-mixture of a weak acid and its corresponding base, vice versaIV. WaterThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-high heat capacity and high specific heatCohesion- molecules resist coming apart from one another when under tensionHydrophobic- water hating, weak repulsionsHydrophilic- water loving, polar moleculesHydrocarbon molecules- contain only H and C, nonpolarHuman body is 70% water by weight Waters covalent bonds are polarWaters structure gives it unique and versatile propertiesWater is the Solvent of
View Full Document