When thorium (90Th 234) emits a β-particle its proton to neutron ratio would become:
Correct answer: C. 91/143
- A. 90/144
- B. 91/144
- C. 91/143
- D. 90/143
Explanation
Proton number of Thorium = 90 Neutron number of Thorium = 243 - 90 = 143 β-particle =-1β0 After the emission of β particle: Proton number = 90 + 1 =91 Neutron number = 143 Ratio of proton number / neutron number = 91 / 143
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About Radioactive Decay
Radioactive decay is the spontaneous transformation of unstable nuclei, described by decay constant, activity, half life and the exponential decay law. Work includes alpha, beta and gamma emissions, decay equations and remaining nuclei, with half life distinguished from the time required for complete decay.
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