Krypton-85 has a half-life of 10. years. Approximately what percentage of Kr-85 produced from the Chernobyl accident in 1986 still remains radioactive in 2010?
A) 25%
B) 12%
C) 6%
D) 3%
A
Environmental & Atmospheric Sciences
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Indicate whether the statement is true or false
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Which rock type makes up approximately 90% of the Earth's crust?
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Compare and contrast the two methods that are currently being used to preserve shortgrass prairies in Montana.
What will be an ideal response?
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