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The Nuclear Disintegration Series of ________ Is the Source of Radon-222

Question 9

Multiple Choice

The nuclear disintegration series of ________ is the source of radon-222 in soil.

A) "²³⁵U"
B) "²³⁸U"
C) "²³⁶Pb"
D) "²³⁵Th"
E) "¹⁴C"

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