Not plutonium, but iodine-131 !!
The half life of 131I is 8,0197 days.
The Chernobyl fallout primarily consisted of radioactive isotopes like iodine-131, cesium-137, and strontium-90, rather than plutonium. Plutonium was not a significant component of the released radiation.
The isotope 131I is a fission product of uranium and plutonium.
Both iodine-129 and iodine-131 are produced by the fission of uranium atoms during operation of nuclear reactors and by plutonium (or uranium) in the detonation of nuclear weapons. US EPA Link below.
131 millimeters is 5.16 inches.
The First Part Last has 131 pages.
"Bad" types of radiation are the types that hurt you. So there is no really bad types, only bad uses. See the website here for the different types: http://www.hps.org/publicinformation/ate/faqs/radiationtypes.html Then decide for yourself what is a good use and a bad use for the different types of radiation.
== You'll find that uranium-235 is the most commonly used radionucliee, and plutonium-239 can be used as well, though the latter is selected as a fuel choice much less often. An extremely distant third is uranium-233. Links can be found below.
about 131 feet
131/60 = 2 and 11/60 hours
2.18 hours.
In radiation therapy, isotopes are often represented by their chemical symbol followed by the mass number. For example, iodine-131 is denoted as I-131, and cobalt-60 is represented as Co-60. This notation indicates the element and the specific isotope used for therapeutic purposes, such as targeting cancer cells.
Iodine-131 (I-131) is a radioisotope commonly used in medicine for treating thyroid disorders, particularly hyperthyroidism and thyroid cancer. It emits beta and gamma radiation that can destroy the overactive thyroid tissue or thyroid cancer cells.