The half-life of carbon and potassium

Reference no: EM13530420

Question 1.

The half-life of carbon-14 is 5730 years. A fossil that is 22920years old would have what amount of the normal portion of C-14 toC-12?

Question 2.

The half-life of potassium-40 is 1.3billion years. If a rockspecimen contained 12 milligrams of potassium-40 when it was formedand now contained 3milligrams of potassium-40, How old is therock?

Reference no: EM13530420

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