1.) 2.) 6.) (two parts) The half-life of radium-226 is 1.60 x 103 yr. How many h
ID: 830787 • Letter: 1
Question
1.)
2.)
6.) (two parts)
The half-life of radium-226 is 1.60 x 103 yr. How many hours will it take for a 2.50-g sample to decay to the point where 0.185 g of the isotope remains? Enter your answer in scientific notation. Name the unidentified species, and write the transmutation process in shorthand notation for the bombardment of 238U with a particle yielding three neutrons and 239Pu. The scene below depicts a neutron bombarding 235U: Is this an example of fission or fusion? Identify the nuclide marked with a question mark. Give its symbol below. Use the sup-subscript tool in the text palette to enter both the mass number and the atomic number of this nuclide.Explanation / Answer
1)0.185=2.50*0.5^(t/t1/2)
0.074=0.5^(t/t1/2)
log(base 0.5) of 0.074=t/t1/2
log0.074/log0.074=t/1.60x10^3 yr
3.756330919=t/1.60x10^3 yr
t=6010 yr
6010 yr x 365 days/yr x 24 hr/day=52647600 hrs
2)http://www.chegg.com/homework-help/name-unidentified-species-write-transmutation-process-shorth-chapter-24-problem-54p-solution-9780077396671-exc
see the c part
6 this is fission the question no marked thing is rubidium atomic number is 37 90Rb37
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