|Isotope||Atomic mass (Da)||Isotopic abundance (amount fraction)|
|234U||234.040 950(8)||0.000 054(5)|
|235U||235.043 928(8)||0.007 204(6)|
|238U||238.050 79(1)||0.992 742(10)|
- Uranium Melting Point
- Uranium Atomic Mass Rounded
- Uranium 235 Atomic Mass
- Uranium Atomic Mass Unit
Uranium Melting Point
Uranium is a weakly radioactive element with an atomic number 92 and symbol U in the periodic table. Uranium is one of the heavy metals that can be utilized as a rich source of concentrated energy. The element exists in many rocks in the concentration of 2 to 4 ppm (parts per million) and common in Earth’s crust as tungsten and tin. How to Convert Atomic Mass Unit to Gram. 1 u = 1.6605402E-24 g 1 g = 6.752E+23 u. Example: convert 15 u to g: 15 u = 15 × 1.6605402E-24 g = 2.4908103E-23 g. Popular Weight And Mass Unit Conversions. Isotope: Mass: Abundance: Spin: Mag Moment: 234 U: 234.040946: 0.005%: 0: 235 U: 235.043924: 0.720%: 7/2-0.35: 238 U: 238.050784: 99.275%: 0.
In 1969, the Commission recommended Ar(U) = 238.029(1) for the atomic weight of Ubased on mass-spectrometric determinations and a careful analysis of the variability of x(235U) in nature. In 1979, the Commission took note of later studies of the variations of the 235U abundance in normal sources, whichjustified a more precise value for the standard atomic weight, thus leadingto Ar(U) = 238.0289(1). The atomic weight and uncertainty of uranium were changed to 238.028 91(3) in 1999 on the basis of new calibrated mass-spectrometric measurements.
That value applies to uranium as found in normal terrestrial sources, except as discovered in one locality in south-west Africa (Gabon at Oklo), hence the annotation 'g'. Uranium is used in the nuclearfuel cycle either enriched or depleted in 235U, hence the annotation 'm'.
Uranium Atomic Mass Rounded
All uranium isotopes are α-emitters. Installing python 3.6 on mac. Isotopes 235U and 238U are primordial with the 235U abundance decliningvery gradually in geological time because of its faster decay. 234U, itself a decay product of 238U, is in equilibriumestablished by the ratio of the half-lives. 235U decays by a branched series ending with 207Pb,238U (and 234U) by a similar series ending in 206Pb. The 238U–206Pb and the 235U–207Pb decay systems are of fundamental importance in geochronology.
© IUPAC 2003
Uranium 235 Atomic Mass
Ar(U) = 238.028 91(3) since 1999
The name derives from the planet Uranus, which in Roman mythology was 'Father Heaven'. TheGerman chemist Martin-Heinrich Klaproth discovered the element in 1789, following William Hershel's discovery of the planet in 1781. The metallic uranium was first isolated by the French chemist Eugène-Melchior Peligot in 1841.
Uranium Atomic Mass Unit
Isotopic reference materials of uranium.