sophie12345 sophie12345
  • 12-06-2016
  • Advanced Placement (AP)
contestada

radioactive decay of 40k in an igneous rock has resulted in a ratio of 25 percent 40k atoms to 75 percent of 40ar and 40ca atoms. How many years old is this rock?

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rey619rocks123 rey619rocks123
  • 17-02-2017
They Are 40k btw your welcome
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