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chem6c week 5 handout

chem6c week 5 handout - to form a neutron 231 92 U-1 e>...

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Chemistry 6C Week 5 Handout Nuclear Chemistry: Type of Decay Particle Emitted When it occurs What happens Example Q Alpha decay α Z>83 A>143 Unstable nucleus ejects He nucleus 238 92 U--> 234 90 Th + 4 2 He 20 Beta- negative decay β - Proton deficient Neutron becomes a proton and emits an electron ( β - ) 14 6 C--> 14 7 N + 0 -1 e - 1 Beta- positive decay β + Neutron deficient Proton becomes neutron and emits an electron ( β + ) 11 6 C--> 11 5 B + 0 +1 e + 1 Electron capture n/e Neutron deficient Electron is captured and combines with proton
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Unformatted text preview: to form a neutron 231 92 U + -1 e---> 231 91 Pa n/a Useful Equations: Dose Equivalent (Sv)= Q x absorbed dose (Gy) Activity (A)= -dN/dt= k N t 1/2 =ln 2 / k N=N e-kt ln(N/N )=-kt E= mc ∆ ∆ 2 (mass must be in kilograms!) Useful constants: 1m u =1.661 x 10-27 kg Mass of proton= 1.0072765m u =1.67262 x 10-27 kg Mass of neutron= 1.0086649m u =1.67493 x 10-27 kg c= 2.9979 x 10 8 m/s Gy= 1J/kg 100 rad/ 1 Gy...
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