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Author Question: Among the following radioactive parent isotopes, which has the shortest half-life? A) uranium-238 ... (Read 142 times)

londonang

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on: Jul 14, 2018
Among the following radioactive parent isotopes, which has the shortest half-life?
 
  A) uranium-238
  B) potassium-40
  C) rubidium-87
  D) carbon-14

Question 2

The longest subdivision of the geologic time scale is the ________.
 
  A) epoch
  B) eon
  C) era
  D) period


Swizqar

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: B


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