This is an extensive subject, I cannot summarise all the isotopes formed into one answer. I suggest you go to the Wikipedia link given below, if that is not detailed enough there are other tables and charts available, an internet search should find several.
No, krypton is normally not radioactive. Almost 60% of krypton is composed of krypton-84.
krypton and barium are both naturally occurring non-radioactive elements. krypton can be extracted from air by fractional liquefaction. barium ore can be mined and barium extracted.
Krypton-85 is a radioactive isotope of krypton. It is not found naturally in significant quantities but is produced through nuclear fission reactions in nuclear power plants, as well as during the reprocessing of nuclear fuel and the detonation of nuclear weapons. So, it is considered a synthetic isotope.
Krypton (isotopes 83 to 86) and barium (isotopes 138 and 139) are fission products of uranium, resulting from the nuclear fission of uranium atom nucleus.
Element 36 is Krypton and is a radioactive gas.
Krypton is an element, and all elements are the result of nuclear fission, nuclear fusion or radioactive decay. Krypton is one of the byproducts of the nuclear fission of Uranium and Plutonium, either from atomic bombs or nuclear reactors. Since Krypton is not one of the results of a natural radioactive decay chain, the only other possible source of Krypton is from nuclear fusion, and the only source of fusion powerful enough to produce it would be a supernova.
No, krypton is normally not radioactive. Almost 60% of krypton is composed of krypton-84.
krypton and barium are both naturally occurring non-radioactive elements. krypton can be extracted from air by fractional liquefaction. barium ore can be mined and barium extracted.
Krypton-85 is a radioactive isotope of krypton. It is not found naturally in significant quantities but is produced through nuclear fission reactions in nuclear power plants, as well as during the reprocessing of nuclear fuel and the detonation of nuclear weapons. So, it is considered a synthetic isotope.
The fission of uranium-235 release krypton and barium (and other isotopes) as fission products.I don't know if the fusion of uranium and krypton is possible in laboratory.
The radioactive decay of americium 241 is by alpha disintegration; the disintegration of radioactive krypton isotopes is by beta particles emission.
Krypton (isotopes 83 to 86) and barium (isotopes 138 and 139) are fission products of uranium, resulting from the nuclear fission of uranium atom nucleus.
Fission products, in the case of uranium, krypton 92 and barium 141.
The daughter atoms from nuclear fission are nearly always radioactive and nearly always have very short half lives decaying through chains of atoms of short half lives. There is a reason for this. We do not know exactly what the daughter atoms from the fission of a given atom will be, but we do know they will contain all the protons of the parent. The number of neutrons is also preserved, though a few unbound neutrons are usually emitted from the fission. Since atoms with higher atomic numbers can have a greater proportion of protons to neutrons, the daughters usually have far too many neutrons to be stable, and will usually undergo negative beta decay. For example, the fission of 235U might look like this: 92235U --> 3692Kr + 56141Ba + 2n The most massive stable isotope of krypton is 86Kr, so our daughter krypton atom has six too many neutrons to be stable. The decay chain of the 92Kr, given as isotopes and half lives, is as follows, with all decays by negative beta decay: 92Kr 1.8 seconds 92Rb 4.5 seconds 92Sr 2.71 hours 92Y 3.54 hours 92Zr stable The most massive stable isotope of barium is 138Ba, so our daughter has three too many neutrons to be stable. The decay chain of the 141Ba similar to the above is as follows, again all by negative beta decay: 141Ba 18.27 minutes 141La 3.92 hours 141Ce 32.5 days 141Pr stable Most of the daughter decay chains do not produce stable isotopes nearly as quickly as the above, with many having products with half lives of decades to millennia. By comparison, our parent atom, 235U, had a half life of 703,800,000 years.
Element 36 is Krypton and is a radioactive gas.
The isotope rubidium-85 is a secondary fission product, from the decay of krypton-85. Also the isotope rubidium-87 is a fission product.
No - though it's released as a by-product of nuclear fission (bomb explosions or reactors), it's not used as a primary component in either prior to fission.