Conversation so far:
which is the correct way to write iodine (i) with an atomic mass of 131
Iodine-131 (131I, I-131) is a radioactive isotope of iodine with an atomic mass of 131.
who discovered iodine-131
Iodine-131 was discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley..
what is the half-life of iodine-131
The half-life of iodine-131 is 8.0197 days.
how is iodine-131 produced
Most iodine-131 production is from neutron irradiation of a natural tellurium target in a nuclear reactor.

Question: what is a use of the isotope
Self-contained rewrite: what is a use of iodine-131