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Assuming 1μg of trace radioactive element X with a half life of 30 years is absorbed by a growing tree.

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Assuming 1μg of trace radioactive element X with a half life of 30 years is absorbed by a growing tree. The amount of X remaining in the tree after 100 years is___ x 10-1 μg. 

[Given : ln 10 = 2.303; log2 = 0.30]

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W = 0.1 x μg

1 x 10-1 μg

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