II Fill in the blanks:
5.
isotope is used in radiotherapy for treatment of cancer.
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2
Explanation:
The isotopes most commonly used in IRT are iridium-192 or iodine-125. Iridium (half-life 74 days), usually in the form of a wire, is used as a removable source.
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2
Answer:
STRONTIUM-89, STRONTIUM-90, SAMARIUM-153 ,RADIUM-223
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