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illestb illestb
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11 years ago
I know this might be a stupid question, but I am relatively new to chemistry and physics. So, what is the difference between regular iodine and radioactive iodine?
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#1
11 years ago
regular iodine is just iodine used as an disinfectant, but the radioactive is used for more purposes in hospitals for detecting cancer.....
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#2
11 years ago
The number of neutrons.  And that difference is what makes radioactive iodine different.

The normal iodine has 74 neutrons and has relative abundance of nearly 100% and is stable.

131 Iodine (radioactive) has 78 neutrons and is a beta and gamma emitter.
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#3
11 years ago
1. atomic number 53 - a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)

iodine-131 - heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter
iodine-125 - light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism
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