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

question 149

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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