Assertion: iodine's isotope | /r/CapableOf | emit radiation
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Source sentences:
text: When a small dose of radioactive iodine I-131 (an isotope of iodine that emits radiation) is swallowed, it is absorbed into the bloodstream and concentrated by the thyroid gland, where it begins destroying the gland's cells.
text: Radioactive iodine (I-131), an isotope of iodine that emits radiation, is used for medical purposes.