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Help!! Which radioactive gas comes from the Earth and sometimes can accumulate in houses or other buildings?

a. Fluorine
b. Chlorine
c. Argon
d. Radon

User Niren
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2 Answers

4 votes
Radon radioactive gas comes from the Earth and sometimes can accumulate in houses or other buildings.
User Sandeep Dhull
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0 votes
D. Radon

Hope this helps
User Sharkdawg
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