Physics
WAEC 1998
Two radioactive elements X and Y have half-lives of 100 and 50 years respectively. Samples of X and Y initially contain equal number of atoms. What is the ratio of the number of the remaining atoms of X to that of Y after 200 years?
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A.
4:1
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B.
3:1
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C.
1:1
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D.
1:2
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E.
1:4
Correct Answer: Option D
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