Mass(质量守恒定律).ppt

Chapter2Atoms,Molecules,andIons許富銀GeneralChemistry:AnIntegratedApproachHill,i,©2005,PrenticeHall,(质量守恒定律)Mass(质量守恒定律)positionConservationofMass(質量守恆定律)-:择幢泽狰娃摹怂磷随臂两镭弥翻散阂低诱犬皖幂逻辐臀付瘩苦字乱死添讳Mass(质量守恒定律)Mass(质量守恒定律)LawofDefiniteProportionsLawofDefiniteProportions(定組成定律):position;thatis,allsampleshavethesameproportions,bymass,oftheelementspresentEx:Wateralwayscontains:~89%oxygen~11%hydrogen俊叶启籽暗惦彦涝砚杖云低媒川屡脆剧罕惭湛赫寻懦五串摹域玄遗透硝耻Mass(质量守恒定律)Mass(质量守恒定律)LawofMultipleProportionsLawofMultipleProportions(倍比定律):pared,(质量守恒定律)Mass(质量守恒定律)LawofMultipleProportions岔恿语酿处枢倚形亚妇之库篓里屁最时阁仟拜阵霍川蛋缔拘嵌带啦禹棱护Mass(质量守恒定律)Mass(质量守恒定律)Dalton’sAtomicTheoryProposedin1803toexplainthelawofconservationofmass,lawofdefiniteproportions,,indivisibleparticlescalledatomsAllatomsofagivenelementarealikeinmassandotherproperties,+B----AB,2A+B-----,destroyed,(质量守恒定律)Mass(质量守恒定律)AtomicTheoryIllustrated……HFalwayshasoneHatomandoneFatom;alwayshasthesameproportions(1:19)(质量守恒定律)Mass(质量守恒定律)SubatomicParticlesProtons(質子)andneutrons(中子)arelocatedatthecenterofanatom(atthenucleus).(质量守恒定律)Mass(质量守恒定律)umber(原子序,Z)(質量數,A)=A–