Answer to Question #164553 in General Chemistry for sabine jeune

Question #164553

After emitting 2 alpha particles, 1 positron, and 3 gamma particles, the resulting daughter nuclide was 24193Np. What was the initial parent nuclide before any particles were emitted? (Incorrect formatting will result in your answer being incorrect)




1
Expert's answer
2021-02-22T05:48:31-0500

The decay equations usually start from a parent and produce a daughter. Depending on the type of reaction together with a daughter, other particles emit. In the current case, we know a daughter(93241Np{^{241}_{93}Np} ) and number and type of emitted particles (224He,1+10β,300γ{2^4_2He}, {1^0_{+1}\beta}, {3^0_0 \gamma} ). To determine a parent nuclide, we will go to the opposite direction by summation of the daughter nuclide and all emmited particles:


93241Np+224He=97249Bk97249Bk+1+10β=98249Cf98249Cf+300γ=98249Cf{^{241}_{93}Np} + 2{^4_2He} = {^{249}_{97}Bk} \\ {^{249}_{97}Bk} + 1{^0_{+1}\beta} = {^{249}_{98}Cf}\\ {^{249}_{98}Cf} + 3{^0_0\gamma} = {^{249}_{98}Cf}


The initial parrent nuclide is 98249Cf{^{249}_{98}Cf}


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