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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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nyno2010 nyno2010
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11 years ago
A rock sample contains 75 atoms of a parent isotope and 25 atoms of a daughter isotope. The half-life of the parent isotope is 100 years. How old is this rock?

Answers:
a. 25 years old
b. 50 years old
c. 75 years old
d. 100 years old
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nypharmnypharm
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11 years ago
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