go+naturally
101Isotopes of rhenium — Naturally occurring rhenium (Re) is 37.4% 185Re, which is stable, and 62.6% 187Re, which is unstable but has a very long half life. There are twenty six other unstable isotopes recognized. Standard atomic mass: 186.207(1) u Table Notes * Values… …
102Isotopes of lutetium — Naturally occurring lutetium (Lu) is composed of 1 stable isotope Lu 175 (97.41% natural abundance). 33 radioisotopes have been characterized, with the most stable being Lu 176 with a half life of 3.78 times; 1010 years (2.59% natural abundance) …
103Isotopes of ytterbium — Naturally occurring ytterbium (Yb) is composed of 7 stable isotopes, Yb 168, Yb 170, Yb 171, Yb 172, Yb 173, Yb 174, and Yb 176, with Yb 174 being the most abundant (31.83% natural abundance). 27 radioisotopes have been characterized, with the… …
104Isotopes of thulium — Naturally occurring thulium (Tm) is composed of 1 stable isotope, Tm 169 (100% natural abundance). 31 radioisotopes have been characterized, with the most stable being Tm 171 with a half life of 1.92 years, Tm 170 with a half life of 128.6 days,… …
105Isotopes of erbium — Naturally occurring erbium (Er) is composed of 6 stable isotopes, Er 162, Er 164, Er 166, Er 167, Er 168, and Er 170 with Er 166 being the most abundant (33.503% natural abundance). 29 radioisotopes have been characterized, with the most stable… …
106Isotopes of dysprosium — Naturally occurring dysprosium (Dy) is composed of 7 stable isotopes, 156 Dy, 158 Dy, 160 Dy, 161 Dy, 162 Dy, 163 Dy and 164 Dy, with 164 Dy being the most abundant (28.18% natural abundance). 28 radioisotopes have been characterized, with the… …
107Isotopes of terbium — Naturally occurring terbium (Tb) is composed of 1 stable isotope, 159 Tb. 33 radioisotopes have been characterized, with the most stable being 158 Tb with a half life of 180 years, 157 Tb with a half life of 71 years, and 160 Tb with a half life… …
108Isotopes of gadolinium — Naturally occurring gadolinium (Gd) is composed of 5 stable isotopes, 154Gd, 155Gd, 156Gd, 157Gd and 158Gd, and 2 radioisotopes, 152Gd and 160Gd, with 158Gd being the most abundant (24.84% natural abundance).Thirty radioisotopes have been… …
109Isotopes 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}… …
110Isotopes 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… …
