Physics
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will:
- Decrease
- Increase
- Remain unchanged
- Depend on the surrounding temperature
Radioactivity
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Answer
Remain unchanged
Reason — Radioactive decay is a nuclear process as it depends on the nucleus of the atom, not on external physical conditions like pressure, temperature, chemical state and presence of air or vacuum. So, placing a radioactive element in an evacuated chamber (a vacuum) will not affect the rate of its decay.
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