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OpenStudy (anonymous):

Alpha-emitting substances, such as radon gas, can be a serious health hazard only if? A. they are inhaled or eaten. B. their radiation strikes the skin. C. exposure to them is external. D. none of the above

OpenStudy (anonymous):

radon is health hazard due to inhalation, so A looks right

OpenStudy (anonymous):

ok thats what i got thanks

OpenStudy (anonymous):

A is right

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