資源描述:
《單質(zhì)和化合物-Elements-and-Compounds.ppt》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、ElementsandCompoundsObjectives?Distinguishbetweenelements單質(zhì)andcompounds化合物.?Describetheorganizationofelementsintheperiodictable元素周期表.?Explainthelawsofdefinite定比定律andmultipleproportions倍比定律element:單質(zhì),元素Choosethemixtureashomogeneous.a.brass(analloyofzincandcopper)b.muddywaterc.bloodd.powdereddri
2、nkmixdissolvedinwaterExercises:Classification:solutionCanyouseeindividualhydrogenandoxygeninthewater?Whatiselementandcompound?UrBr2CuAnelementisapuresubstancethatcannotbeseparatedintosimplersubstancesbyphysicalorchemicalmeans.Element單質(zhì)Groupdiscussion:Canyougivesomeelementsasmanyasyoucan?(InEng
3、lish)CuHgHe/consistingofasingletypeofatomPeriodicTableWhowasthefirsttoinventthemodernperiodictable?Mendeleevbasedonthesimilaritiesandmassesoftheelementsperiod周期group族Compound化合物What’sthesimilaritiesbetweenwaterandcarbondioxideCO2?ConsistoftwokindsofelementsPuresubstance,consistofoxygenmadeupof
4、twoormoredifferentelementsthatarecombinedchemicallyHowcanyouprovesaltismadeupoftwoelements?Canyoutaste3things?NaCl2Howcanyouprovewaterismadeupoftwoelements?Theexperiment?Anelectriccurrentbreaksdownwaterintoitscomponents,oxygenandhydrogen.electrolysis電解Summarize:Classifythefollowingmattersinto(
5、mixture、puresubstance、element、compound):Choosethecompoundsfromfollowingsubstances()tablesalt,water,alcohol,sucrose,sulfuricacid,bakingsoda,carbondioxide,oxygen,helium食鹽酒精蔗糖LawofconservationofmassMassisneithercreatednordestroyedduringachemicalreaction—itisconserved保存的質(zhì)量守恒定律What’sthechangeofiron
6、?Ifthemassofreactantsequalproducts?massreactants=massproductsA13.0-gsampleofXcombineswitha34.0-gsampleofYtoformthecompoundXY2.Whatisthemassofthereactants?Let’stry:反應(yīng)物生成物P9:502.If14.0gofN2gasreactswithexcessofhydrogengas,What’sthemassofNH3formed?History:AntoineLavoisiermercury(II)oxideUsethedat
7、ainthetabletoanswerthefollowingquestions.