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Radioactivity is the -------------- disintegration of an atomic nucleus that releases energy to become stable *

a. Extraordinary

b. Normal

c. Ordinary

d. Spontaneous​

User Worpet
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2 Answers

24 votes
24 votes

Answer:

The answer is spontaneous.

User Tulio
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15 votes
15 votes
Spontaneous, as it happens randomly
User Tom Johnson
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