Element:U
From Metabolomics.JP
It was first isolated by Peligot in 1841. Its name comes from Uranus (Greek goddess of astronomy). In ancient Rome, pitchblende was used to stain glass into rich yellow. Its mass is 18.9, almost as heavy as gold (19.3). It has 16 radioactive isotopes, and 238U yeilds plutonium (239Pu).
Atomic Number
92
Atomic Name
Uranium(ウラン)
Stable Isotopes
| isotope | mass | isotopic abundance (%) |
|---|---|---|
| 234U | 234.0409447 | [0.0054(5)] = (Natural radioactivity isotope) |
| 235U | 235.0439222 | [0.7204(6)] = (Natural radioactivity isotope) |
| 238U | 238.0507835 | [99.2742(10)] = (Natural radioactivity isotope) |
Radioisotopes
| isotope | half life | disintegration form |
|---|---|---|
| 232U | 68.9 years | alpha |
| 233U | 1.592 x 105 years | alpha, SF |
| 234U | 2.455 x 105 years | alpha, SF |
| 235U | 7.038 x 108 years | alpha, SF |
| 237U | 6.75 days | beta- |
| 238U | 4.468 x 109 years | alpha, SF |
| 239U | 23.45 minuites | beta- |
