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Half Life

Last updated over 3 years ago

5 questions

1

How are half-lives useful for earth science?

100g of Element X are found in a rock sample. Element X decays into Element Y and has a half-life of 1000 years.

1

How much Element X exists after one half life?

1

How much time has passed after 3 half lives?

1

After 2 half lives, there is 25g of Element X. How much Element Y is there in the sample?

1

A fossil is discovered with 25g of Element X. What is the absolute age of the fossil?