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Nuclear Chemistry

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Nuclear Chemistry

Nuclear Chemistry

The AtomThe atom consists of two parts:1. The nucleus which contains:2. Orbiting electrons.protonsneutronsMultiple nuclei is called nucleons= NuclideXAZMass numberAtomic numberElement symbol= number of protons + number of neutrons= number of protonsU23592U23892There are many types of uranium:Mass #Atomic #Number of protonsNumber of neutronsMass #Atomic #Number of protonsNumber of neutrons23592921431469292238Same number of protons but different number of neutrons is a..ISOTOPEMost naturally occurring isotopes are stable.Atoms want to be stableRatio of p+ to n0 determines.Nucleus Stability Radioactive Decay(radioactivity)Unstable nuclei decomposes into stable nuclei, this is called

an alpha particle (a), a beta particle (b), or a gamma ray(g).Radioactive Decay emits:An alpha particle is identical to that of a helium nucleus.It contains two protons and two neutrons.Alpha DecayHe42Alpha DecayRa22688Rn22286He42XAZYA - 4Z - 2+He42Alpha Decayunstable atommore stable atomalpha particleAlpha Decay22286RnRa22688+He42Ra22688+He42Th 23090U23492Th23090+He42Alpha Decay+Pb21482He42Po 21884Rn22286Po21884+He42SymbolCompositionRangeShieldAlpha ParticleHe orHelium Beta Particle Gamma Ray

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Beta Decay is a fast moving electron.Created when a n0 changes into a p+ & e- Beta DecayPo21884b0-1At21885XAZY AZ + 1+b0-1Beta Decayunstable atommore stable atombeta particleBeta DecayPa23491Th23490+b0-1At21885Po21884+b0-1Beta DecayBi21083Po21084+b0-1Pb21082Tl21081+b0-1Bi21483+b0-1Pb21482SymbolCompositionRangeShieldAlpha ParticleHe orHelium Beta Particle e- or Electron Gamma Ray

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Heavy Clothing, glass, light metals, plastic

Gamma DecayNot a charged particle it is energy.Electromagnetic radiation with high frequency

Draw the correct wave

SymbolCompositionRangeShieldAlpha ParticleHe orHelium Beta Particle e- or Electron Gamma Ray Photons (electromagnetic spectrum)

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Heavy Clothing, glass, light metals, plastic

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Lead or concrete

Half Life:Time for half of the radioactive nuclide to decay1. How much of a 100 g sample of 198Au is left over 8.10 days if its half-life is 2.70 days?2. A 50.0 g sample of 16N decays to 12.5 g in 14.4 seconds. What is the half-life?3. The half life of 42K is 12.4 hours. How much of a 750g sample is left over after 62.0 hours?4. What is the half-life of 99Tc if a 500 g sample decays to 62.5g in 639, 000 years?5. There are 5.0 g of 131I left after 40.35 days. How many grams were in the original sample if its half-life is 8.07 days?RadioactiveImagine DragonsImagine DragonsNight Visions2012-09-04T07:00:[email protected] 2012 Interscope Records2013-03-03 13:56:49Universal:isrc:USUM71201074HQAlex Da Kid/Imagine Dragons/Josh Mosser


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