asked 223k views
5 votes
Where does radioactivity come from?

A.The nuclei of unstable isotopes

B. Physical changes in atoms

C. Chemical reactions

D. The breaking of chemical bonds

asked
User Ajayel
by
8.0k points

1 Answer

5 votes
A.) the nuclei of unstable isotopes.
answered
User Kamilah
by
8.7k points
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