ajordan101 ajordan101
  • 21-02-2016
  • Physics
contestada

Radioactive decay of 40k atoms in an igneous rock has resulted in a radio of 25 percent 40k atoms to 75 percent 40Ar and 40Ca atoms. How many years old is this rock

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AL2006
AL2006 AL2006
  • 21-02-2016
In order to answer this, we would need to know
the half-life of ⁴⁰K.  Perhaps when you look that up,
you'll be able to answer this on your own.

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