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Hi, I have a question and I hope anyone could answer it:
What do we mean when we say that a nucleus undergoes radioactive decay?
The nucleus splits into two equal size pieces.
The mass of the nucleus is converted into high-energy X rays and gamma rays.
The nucleus emits radio waves.
The number of protons or neutrons (or both) in the nucleus changes.
The number of protons or neutrons (or both) in the nucleus changes.