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malfutka [58]
3 years ago
13

Where does radioactivity come from?

Chemistry
1 answer:
julia-pushkina [17]3 years ago
3 0

Answer:

C. radioactive material

Explanation:

This exposure primarily comes from cosmic rays, radioactive material in the earth (such as uranium-238), ingestion of naturally occurring radionuclides in food (such as potassium- 40), and inhalation of radon gas. In the United States, the average background radiation dose is 300 mrem/yr.

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