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1、NuclearFusionVs.Fusion1.Nuclearreactionsdealwithinteractionsbetweenthenucleiofatoms.2.Bothnuclearfissionandnuclearfusionprocessesdealwithmatterandenergy.3.TheLawofConservationofMass(thereasonwebalanceequations)taughtusthat“matterandenergycannotbecreatedordestroyed.”4.Wenowneedto
2、understandthatmatterandenergytwoformsofthesamethin5.MattercanbechangedintoEnergy6.Einstein’sformulaE=mc2tellsushowthechangeoccurs7.Intheequationabove:8.E=Energy9.m=mass10.c=Speedoflight11.12.Fissionmaybedefinedastheprocessofsplittinganatomicnucleusintofissionfragment.13.Thefissi
3、onfragmentsaregenerallyintheformofsmalleratomicnucleiandneutrons.14.Largeamountsofenergyareproducedbythefissionprocess.15.Fissilenucleiaregenerallyheavyatomswithlargenumbersofnucleons.16.Thenucleiofsuchheavyatomsarestruckbyneutronsinitiatingthefissionprocess.1.Fissionoccursdueto
4、electrostaticrepulsioncreatedbylargenumbersofprotonswithinthenucleiofheavyatoms2.ThefissionprocessisanaturaloccuranceasaFrenchresearcherfoundanaturaluraniumreactorinGabon,WestAfrica;ithasbeenestimatedtobeover2billionyearsold.3.Fissionproduceslargeamountsofheatenergyanditisthishe
5、atthatiscapturedbynuclearpowerplantstoproduceelectricity.4.Fusionisanuclearreactionwherebytwolightatomicnucleifuseorcombinetoformasinglelarger,heaviernucleus.5.Thefusionprocessgeneratestremendousamountsofenergy;referbacktoEinstein’sequation6.Forfusiontooccur,alargeamountofenergy
6、isneededtoovercometheelectricalchargesofthenucleiandfusethemtogether.7.Fusionreactionsdonotoccurnaturallyonourplanetbutaretheprincipaltypeofreactionfoundinstars8.Thelargemasses,densitiesandhightemperatureofstarsprovidetheinitialenergiesneededtofuelfusionreactions1.Thesunfuseshyd
7、rogenatomstoproducehelium,subatomicparticles,andvastamountsofheliumREVIEW:1._______________and____________aretwoformsofthesamething;neithercanbecreatednordestroyedbutmasscanbeconvertedintoenergy(E=mc2)2.___________isanuclearreactioninwhichaheavyatomicnucleusissplitintolighterato
8、micnuclei3.___________isanuclearreactioninwhich
