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Earthy Earthy
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8 years ago
A datable mineral crystal contains 40% parent isotope. How many half-lives have passed since the crystal formed?
A) 1
B) more than 1 but less than 2
C) more than 2 but less than 3
D) more than 3
Textbook 
Foundations of Earth Science

Foundations of Earth Science


Edition: 7th
Authors:
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Richy271Richy271
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#1
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8 years ago
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Earthy Author
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#2
8 years ago
Quick and to the point. Thank you.
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#3
8 years ago
You're very welcome, but don't forget to mark it solved!
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#4
3 years ago
thx
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