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Q. Presence of which among the following minerals in Banana makes them slightly radioactive?
Answer: Pottasium
Notes: Bananas contain potassium-40, a radioactive isotope of potassium, which makes them slightly radioactive. The radiation is very minor and not dangerous at all to humans, but it is enough to trigger sensitive radiation sensors. The potassium provides bananas some of their nutritional benefits as well.

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📌 Question Number: 1 in Chemistry-8-Radioactivity in the above course in App.