The radioactive isotope used in the treatment of cancer is :
(a) plutonium-239 (b) arsenic-74
(c) cobalt-60 (d) iodine-131

Academic Chemistry NCERT Class 9

Correct Answer: (c) cobalt-60

Explanation: Cobalt-60 is used in the treatment of cancer. High-energy gamma rays emitted by cobalt-60 isotopes destroy cancerous tumors.

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Updated on: 10-Oct-2022

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