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23 Nov 2019
The half-life of the uranium isotope U235 is 700 million years. Theearth is approximately 4.5 billion years old. How much more U235was there when the earth formed than there is today?
Please use a then to now ratio: (No/N)
Thanks!
The half-life of the uranium isotope U235 is 700 million years. Theearth is approximately 4.5 billion years old. How much more U235was there when the earth formed than there is today?
Please use a then to now ratio: (No/N)
Thanks!
1
answer
0
watching
42
views
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Tod ThielLv2
27 Mar 2019