Nbsp2b assume you have a sample of atoms with a half-life


  1. 2b. Assume you have a sample of atoms with a half-life of 0.5 second. Approximately how much (in %) of the original sample will be around after 3.5 seconds? * Choose the answer closest to the exact value.
  •  0.1%
  •  0.3%
  •  1%
  •  3%
  •  10%
  •  30%
  •  100%

2c. Potassium-40 decays to Argon-40 with a half-life of 1.25 billion years old. If at the formation of the Earth we had 100% Potassium-40 and 0% Argon-40, what should be ratio of Potassium-40 / Argon-40 on the Earth today? * choose closest answer

  •  0.05
  •  0.09
  •  .40
  •  0.91
  •  1.1
  •  2.5
  •  3.6
  •  11.5
  •  20
  •  100

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Biology: Nbsp2b assume you have a sample of atoms with a half-life
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