Question: Number 5. Please help me Answer: 4. The half-life of UX 18 24.1 days. How long after a sample of UX1 has been isolated will

Number 5. Please help me

4. The half-life of UX 18 24.1 days. How long after a

Answer:

sample of UX1 has been isolated will it take for 90% of

4. The half-life of UX 18 24.1 days. How long after a sample of UX1 has been isolated will it take for 90% of it to change to UX2? 95%? 99%? 63.2%? 5. What are the weights of (a) 1 curie and 1 rd of Ra? (b) 1 curie and 1 rd of Rn? (c) 1 microcurie and 1 rd of RaA? (d) 1 microcurie and 1 rd of RaC'? 6. A sample of ionium (Th230) weighing 0.100 mg was found to undergo 4.32 X 106 disintegrations/min. What is the half-life of this nuclide? Ionium is formed by the a-decay of U234. How many rutherfords of IJ234 would be

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