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A sample of rock is found to contain 100 grams of a parent isotope. How many grams of the parent isotope will remain after two half-lives? 100 75 50 25

A sample of rock is found to contain 100 grams of a parent isotope. How many grams of the parent isotope will remain after two half-lives? 100 75 50 25
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A sample of rock is found to contain 100 grams of a parent isotope. How many grams of the parent isotope will remain after two half-lives?

100

75

50

25

asked
User Sven Dhaens
by
8.1k points

2 Answers

5 votes

Answer:

25 grams

Step-by-step explanation:

If you see only

100 and 25 then it's 25

answered
User Gilles Radrizzi
by
9.0k points
3 votes
the answer is 50. I really hope this helps.
answered
User Yves Baumes
by
8.2k points
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