half-life exchange
91Rubidium — krypton ← rubidium → strontium K ↑ Rb ↓ …
92Fission product — Fission products are the atomic fragments left after a large nucleus fissions. Typically, a large nucleus like Uranium fissions by splitting into two smaller nuclei, along with a few neutrons and a large release of energy in the form of heat… …
93List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
94Cobalt — This article is about the metal. For other uses, see Cobalt (disambiguation). iron ← cobalt → nickel ↑ Co ↓ Rh …
95Terbium — (pronEng|ˈtɝbiəm) is a chemical element with the symbol Tb and atomic number 65. Characteristics Terbium is a silvery white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. It is reasonably stable in air (it… …
96Hemoglobin — Hemoglobin, human, adult (heterotetramer, (αβ)2) Structure of human hemoglobin. The protein s α and β subunits are in red and blue, and the iron containing heme groups in green. Fro …
97Neodymium — praseodymium ← neodymium → promethium ↑ Nd ↓ U …
98Promethium — (pronEng|prəˈmiːθiəm/, /proʊˈmiːθiəm) is a chemical element with the symbol Pm and atomic number 61. It is notable for being the only other exclusively radioactive element besides technetium which is followed by chemical elements that have stable …
99Yttrium — (pronEng|ˈɪtriəm) is a chemical element with symbol Y and atomic number 39. It is a silvery metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. Yttrium is almost always… …
1001 E19 s and more — To help compare orders of magnitude of different times, this page lists times longer than 1019 seconds (317 billion years). See also Heat death of the universe .Some radioisotopes have extremely long half lives: *(1.4 ± 0.4) times; 1017 years… …
