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Quantum Mechanics Grade 12 review Questions and Answers UPDATED 2026

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Quantum Mechanics Grade 12 review Questions and Answers UPDATED 2026

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Quantum Mechanics

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Quantum Mechanics

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Quantum Mechanics Grade 12
review Questions and Answers
UPDATED 2026
WhoBintroducedBtheBideaBthatBparticlesBcouldBbehaveBlikeBwaves?B-
BAnswerBLouisBdeBBroglie

WhatBtheoryBdidBErwinBShrodingerBproduce?B-
BAnswerBtheBelectronBcanBonlyBhaveBcertainBquantizedBenergiesBbecauseBofBtheBreq
uirementBforBonlyBwholeBnumberBofBwavelengthsBforBtheBelectronBwaveB(nodes)

WhoBandBwhatBdiscoveredBtheBHeisenbergBUncertaintyBPrinciple?B-
BAnswerBWernerBHeisenbergBdiscoveredBtheBprincipleBthatBstatesBitBisBimpossibleBtoB
simultaneouslyBknowBexactBpositionBandBspeedBofBaBparticleB(specificallyBelectrons)

WhatBwasBDalton'sBatomicBtheory/model?B-
BAnswerBDaltonBproducedBtheBbillardBballBmodel.BHisBtheoryBstatesBmatterBisBcompo
sedBofBindestructible,BindivisibleBatoms,BwhichBareBidenticalBoneBelement,BbutBdiffere
ntBfromBotherBelements.

HowBdidBJJBThomsonBcontributeBtoBtheBatomicBtheory?B-
BAnswerBJJBThomsonBcreatedBtheBplumBpuddingBmodel.BHeBexperimentedBwithBcatho
deBrayBtubesBtoBshowBthatBallBatomsBcontainBtinyBnegativelyBchargedBelectronsBwith
BembeddedBpositiveBmaterial.

WhatBexperimentBdidBRutherfordBconduct?BWhatBatomicBmodelBdidBitBhelpBcreate?B-
BAnswerBGoldBfoilBexperimentBthatBhelpedBcreateBtheBnuclearBmodel.BRutherfordBdis
coveredBthatBatomsBareBmostlyBemptyBspaceBwithBaBtiny,Bdense,BpositivelyBchargedB
nucleus.

HowBdidBRutherfordBknowBthatBtheBnucleusBwasBpositivelyBcharged?B-
BAnswerBFromBhisBexperiment,BRutherfordBdrewBtheBconclusionsBthatBmostBalphaBpa
rticlesBpassBthroughBtheBfoil,BhoweverBaBsmallBhandfulBofBatomsBwereBdeflectedBasBt

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Quantum Mechanics Grade 12 review Questions and Answers UPDATED 2026

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