Naturally
111Isotopes of europium — Naturally occurring europium is composed of 2 isotopes, 151Eu and 153Eu, with 153Eu being the most abundant (52.2% natural abundance). While 153Eu is stable, 151Eu was recently found to be unstable to alpha decay with half life of 5 { 3}^{+11}… …
112Isotopes of praseodymium — Naturally occurring praseodymium (Pr) is composed of one stable isotope, 141Pr. Thirty eight radioisotopes have been characterized with the most stable being 143Pr with a half life of 13.57 days and 142Pr with a half life of 19.12 hours. All of… …
113Isotopes of cerium — Naturally occurring cerium (Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce with 140Ce being the most abundant (88.48% natural abundance); 136Ce, 138Ce, and 142Ce are predicted to undergo double beta decay but this process… …
114Isotopes of lanthanum — Naturally occurring lanthanum (La) is composed of one stable (139La) and one radioactive (138La) isotope, with the stable isotope, 139La, being the most abundant (99.91% natural abundance). 38 radioisotopes have been characterized with the most… …
115Isotopes of barium — Naturally occurring barium (Ba) is a mix of seven stable isotopes. There are twenty two isotopes known, but most of these are highly radioactive and have half lives in the several millisecond to several minute range. The only notable exceptions… …
116Isotopes of silver — Naturally occurring silver (Ag) is composed of the two stable isotopes 107Ag and 109Ag with 107Ag being the more abundant (51.839% natural abundance). Standard atomic mass: 107.8682(2) u. Twenty eight radioisotopes have been characterised with… …
117Isotopes of cadmium — Naturally occurring cadmium (Cd) is composed of 8 isotopes. For two of them, natural radioactivity was observed, and three others are predicted to be radioactive but their decays were never observed, due to extremely long half life times. The two …
118Isotopes of palladium — Naturally occurring palladium (Pd) is composed of six isotopes. The most stable radioisotopes are 107Pd with a half life of 6.5 million years, 103Pd with a half life of 17 days, and 100Pd with a half life of 3.63 days. Eighteen other… …
119Isotopes of rhodium — Naturally occurring rhodium (Rh) is composed of only one isotope, 103Rh. The most stable radioisotopes are 101Rh with a half life of 3.3 years, 102Rh with a half life of 207 days, 102mRh with a half life of 2.9 years, and 99Rh with a half life of …
120Isotopes of ruthenium — Naturally occurring ruthenium (Ru) is composed of seven stable isotopes. Additionally, 34 radioactive isotopes have been discovered. Of these radioisotopes, the most stable are 106Ru with a half life of 373.59 days, 103Ru with a half life of… …
