| Information | |
|---|---|
| has gloss | eng: Naturally occurring tungsten (W) consists of five isotopes whose half-lives are so long that they can be considered stable. All can decay into isotopes of element 72 (hafnium) by alpha emission; 180W has been observed to have a half life of 1.8 +- 0.2 Ea (1018 years). The other naturally occurring isotopes have not been observed to decay, constraining their half-lives to be: 182W, T1/2 > 8.3 Ea; 184W, T1/2 > 29 Ea; 185W, T1/2 > 13 Ea; 186W, T1/2 > 27 Ea. On average, two alpha decays of 180W occur in one gram of natural tungsten per year. |
| lexicalization | eng: Isotopes of tungsten |
| subclass of | (noun) one of two or more atoms with the same atomic number but with different numbers of neutrons isotope |
| has instance | e/Tungsten-158 |
| has instance | e/Tungsten-159 |
| has instance | e/Tungsten-160 |
| has instance | e/Tungsten-161 |
| has instance | e/Tungsten-162 |
| has instance | e/Tungsten-163 |
| has instance | e/Tungsten-164 |
| has instance | e/Tungsten-165 |
| has instance | e/Tungsten-166 |
| has instance | e/Tungsten-167 |
| has instance | e/Tungsten-168 |
| has instance | e/Tungsten-169 |
| has instance | e/Tungsten-170 |
| has instance | e/Tungsten-171 |
| has instance | e/Tungsten-172 |
| has instance | e/Tungsten-173 |
| has instance | e/Tungsten-174 |
| has instance | e/Tungsten-175 |
| has instance | e/Tungsten-176 |
| has instance | e/Tungsten-177 |
| has instance | e/Tungsten-178 |
| has instance | e/Tungsten-179 |
| has instance | e/Tungsten-180 |
| has instance | e/Tungsten-181 |
| has instance | e/Tungsten-182 |
| has instance | e/Tungsten-183 |
| has instance | e/Tungsten-184 |
| has instance | e/Tungsten-185 |
| has instance | e/Tungsten-186 |
| has instance | e/Tungsten-187 |
| has instance | e/Tungsten-188 |
| has instance | e/Tungsten-189 |
| has instance | e/Tungsten-190 |
| has instance | e/Tungsten-191 |
| has instance | e/Tungsten-192 |
| Meaning | |
|---|---|
| Japanese | |
| has gloss | jpn: タングステン(W)の同位体のうち天然に存在するものは、5種類あり、半減期が極めて長いため、安定と見なされている。5種類は全て、ハフニウム（Hf）にアルファ崩壊する。180Wは1.8±0.2×1018年（Ea）の半減期を持つ。その他の天然同位体は未だ崩壊が観測されていないが、半減期は次のように考えられている。182W, T1/2 > 8.3 Ea; 184W, T1/2 > 29 Ea; 185W, T1/2 > 13 Ea; 186W, T1/2 > 27 Ea. 。平均して、1年間に1グラムのタングステン当たり2度のアルファ崩壊が起こるはずである。 |
| lexicalization | jpn: タングステンの同位体 |
| Chinese | |
| has gloss | zho: 鎢 (原子質量單位:183.84(1) )的同位素。 |
| lexicalization | zho: 鎢的同位素 |
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