Element X has a half life of 9 days and decays into element Y. How much element Y is created after 45 days from a 640 g sample of X?   A. 620 grams   B. 20 grams     C. gamma rays        D. 120 grams       E. 40 grams

Q: 1.Which of these is a description of nuclear fission?

A: A is correct option.

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A: This process is involved in the production of more massive elements like Sr in the supernova.

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A:

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Q: What type of radiation occurs when a negatively charged electron is emitted from a nucleus?

A: ANSWER

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A: * Z represent  atomic number that is number of proton present  in an tom

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Q: When element 82 undergoes 4 alpha decays and three gamma decays, the new element is     A. 90…

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A: when the ratio of neutrons to protons in the nucleus is too high. An excess neutron transforms into…

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A:

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Q: The half-life time of a radioactive element is 6.0 days. A sample of 50.0 g of this element is…

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Q: Which one/s take place in radioactive decay? I. An unstable nucleus spontaneously loses energy by…

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Q: 3 Carbon-14 has a half life of about 5,730 years. If an archeologist examines a bone and finds 6.25%…

A: Given :  Half life of C-14 = 5730 years  % of C-14 = 6.25 %

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A: A.     Half life of Sr-90 ( t1/2) = 29 y           Let ' t '    =  100 y       n × t1/2   =  t…

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Q: What daughter nucleus is produced when a 5526Fe nucleus undergoes electron capture? a. 5527Co b.…

A: Electron Capture (K-capture): In this process, an electron is absorbed from the K-shell and forms a…

Q: Element 46 undergoes 4 alpha decays to become element   A. 50   B. 40   C. 38   D. 46   E.…

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Q: Which one of each pair of nuclides would you expect to have thelonger half-life?a. Cs-149 or Cs-139…

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Q: Phosphorus-32 Original amount: 30.0 g Amount left: Total time: 114.5 d Half-life: 14.3 d Number of…

A: We can determine the solution by the following formula : t = 2.303k log NoNk = 0.693thalf Where t =…

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Q: Element 88 undergoes 16 gamma, 8 alpha, 4 negative beta and 10 positive beta decays. The resulting…

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