see eye to eye (with someone) - definition and synonyms. Close. 90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
Iodine, in the form of iodide, is made into two radioactive isotopes that are commonly used in patients with thyroid diseases: I-123 (harmless to thyroid cells) and I-131 (destroys thyroid cells).odine, in the form of iodide, is made into two radioactive isotopes that are commonly used in patients with thyroid diseases: I-123 (harmless to thyroid cells) and I-131 (destroys thyroid cells).
The isotopes used are called radioactive tracers. Tracers are decaying atoms that have been mixed with high concentrations of other unstable atoms. Chemical reactants designed to seek out certain processes within the body are mixed in with the tracer atoms.adioactive decay can occur inside materials like rocks, and plants over long periods of time. It can also take place inside the human body. The importance of radioactive decay lies in the type of information that can gathered about a human body, or a fossil when radiation amounts are measured.