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OpenStudy (anonymous):
What makes an element radioactive?
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OpenStudy (aaronq):
instability of an atom's nucleus due to it's arrangement/number of protons and neutrons.
OpenStudy (aaronq):
there is a deeper answer, but i dont know it. I've seen on the physics section, so you might wanna ask there
OpenStudy (anonymous):
okay thank you!
OpenStudy (aaronq):
no problem~
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