Asked by shelly

the half life of Uranium -238 is 4.5 billion years and the age of earth is 4.5 X 109 years. What fraction of Uranium-238 that was present when earth was formed still remains?

8 years ago

Answered by Steve

4.5x10^9 = 4.5 billion years.

so, one half-life has passed...

8 years ago

Answered by SHATRA

I'm lahma.

8 years ago

Answered by Nandini

How?

3 years ago

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