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1、一、教学目的及要求：使学生了解和掌握元素和化合物的部分词汇及其构成，理解课文内容和翻译。理解专业英语的学习方法、教学要求和成绩考查方法。二、教学内容提要：学习lessononeTextAElementandCompoundsAllmatteriscomposedofbasicsubstancescalledelement.Anelementcannotbebrokendownintosimplerunitsbychemicalreactions;itcontainsonlyonekindsofatom.Anatom
2、isthesmallestcharacteristicunitofanelement.Acompoundisasubstancethatcanbespitintotwoormoreelement.Waterisacompoundbecauseitcanbespitintoitscomponents,hydrogenandoxygen.Theformulaofacompoundgivesinformationaboutthekindsandnumbersofatomsthatmakeupeachmoleculeoft
3、hatcompound.Aformulacontainsthesymbolsofthekindsofatomsineachmoleculeandsubscriptsthatindicatethenumberofeachkindsofatominthemolecule.Forexample,theformulaforwateriH^Oindicatethatawatermoleculecontainstwohydrogenatomsandoneoxygenatom;andamoleculeoftheglucose,C
4、6H12O6,containssixcarbonatoms,twelvehydrogenatoms,andsixoxygenatoms.Whencarbonuniteswithoxygen,itformsacolorless,odorless,andtastelessgascalledcarbondioxide,whichisheavierthanairandwillextinguishflame.Carbondioxideislikenitrogeninmanyways,butifitismixedwithlim
5、ewater,itcausestheclearliquidtobecomemilky,whilenitrogendoesnot.Thisisthetestforcarbondioxide.Carbondioxideisasourceofplantfood.Plantshavethepowertotakethisgasfromtheair,combineitwithwater,andmakeitintotheirtissues;infactitisfromthissourcethatallorganiccarbonc
6、omes.Mineralcompoundsaremadeofelementssuchassulphur,phosphorus,iron,potassium,sodium,andcalcium.Calciumuniteswithsulphurandoxygentoformcalciumsulphate,andwithphosphorusandoxygentoformcalciumphosphate.学习lessononeTextBcarbohydratesCarbohydratesareusuallydefineda
7、spolyhydroxyaldehydesandketonesorsubstancesthathydrolyzetoyieldpolyhydroxyaldehydesandketones.Monosaccharidesareclassifiedaccordingto(1)thenumberofcarbonatomspresentinthemoleculeand(2)whethertheycontainanaldehydeorketogroup,thusamonosaccharidecontainingsixcarb
8、onatomsiscalledhexose;amonosaccharidecontaininganaldehydegroupiscalledanaldose;andonecontainingaketoiscalledaketose.Themostimportantrepresentativesofmonosaccharidesareglucose,arabi
