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There are 200 particles of a certain atom in a chamber. If you know that this atom has a halflife of 4 minutes, how many particles will still be radioactive after 4 minutes? Select the best answer
A. about 25
B. about 50
C. about 100
D. about 200
 one year ago
 one year ago
There are 200 particles of a certain atom in a chamber. If you know that this atom has a halflife of 4 minutes, how many particles will still be radioactive after 4 minutes? Select the best answer A. about 25 B. about 50 C. about 100 D. about 200
 one year ago
 one year ago

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C. about 100 Final Answer.
 one year ago

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Assume you have two radioactive samples (each has the same number of particles). You leave both samples sitting overnight. In the morning, Sample A has no radioactive particles remaining, while Sample B is still noticeably radioactive. This experiment is done many times with the same result. Which sample has a longer half life? A. Sample A B. Sample B C. More information is needed D. Both have the same half life
 one year ago

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Out of 5 undisturbed horizontal beds of sedimentary rock, we can say that _______________. A. the top layer is oldest B. the lowest layer is oldest C. there is no way of knowing which is oldest D. the 2nd and 3rd are younger than the top layer. 2 more
 one year ago

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Sorry for the late response. I have frostbite on my finger :( The answer would be B. the lowest layer is oldest
 one year ago

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Frostbite: Injury to body tissues caused by exposure to extreme cold, often resulting in gangrene.
 one year ago

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The largest subdivisions are ___________. A. eons B. epochs C. eras D. periods
 one year ago
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