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Author Question: Name the first three isotopes of hydrogen and their nuclide symbols, and indicate which is most ... (Read 66 times)

Diane

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on: Jul 27, 2018
Name the first three isotopes of hydrogen and their nuclide symbols, and indicate which is most common and which is most unstable.
 
  What will be an ideal response?

Question 2

If a nuclide has a decay constant of 0.765  10-6 s-1 and contains 3.0  1017 nuclei
 
  (a) what is the half life?
  (b) what is its initial activity?
  (c) what is the activity after 12. days?


meltdown117

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Reply #1 on: Jul 27, 2018
Answer to Question 1

ordinary hydrogen 1H , deuterium 2H , and tritium 3H ; 1H being most common and 3H most unstable decaying with a 12. year half life.

Answer to Question 2

(a) 9.06  105 s
(b) 2.3  1011 decays/s
(c) 1.0  1011 decays/s


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