Element Uranium 

Uranium ElementIt is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
Uranium is a chemical element with the symbol U and atomic number 92.

Names and Identifiers

Chemical Formula:U
CAS:7440-61-1
Molecular Weight:238.02900 g/mol
EC Number :n/a
MDL Number:n/a
Color:metallic gray/ silvery-white
Other Names:D’uranium, Uran, Uranio
PubChem CID:23989
IUPAC Name:Uranium
Inchl:InChI=1S/U
InChI Key:JFALSRSLKYAFGM-UHFFFAOYSA-N
Canonical SMILES:[U]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:19.1g/cm³
Boiling Point:4404 K ​(4131 °C, ​7468 °F)
Melting Point:1405.3 K ​(1132.2 °C, ​2070 °F)
Molecular Formula:U
Flash Point:n/a
Exact Mass:238.05100
Symbol:Globally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H315-H319
Precautionary Statements:n/a
Hazard Codes:Xi
Risk Phrases:36-38
Safety Phrases:26
RIDADR:n/a
WGK Germany:1
RTECS:n/a
Packaging Group:n/a
Hazard Class:n/a

Natural uranium consists of three major isotopes: uranium-238 (99.28% natural abundance), uranium-235 (0.71%), and uranium-234 (0.0054%).

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
234U234.0409468 (24)[0.0055 (2)]00
235U235.0439242 (24)[0.7200 (51)]7/2-0.35
238U238.0507847 (23)[99.2745 (106)]00

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
230U230.0339320.8 dα to 226Th0
231U231.036264.2 dα to 227Th5/2
232U232.0371568.9 yα to 228Th0
233U233.0396281.59 x 105 yα to 229Th; SF5/20.59
234U234.0409468 (24)2.45 x 105 yα to 230Th; SF0
235U235.0439242 (24)7.04 x 108 yα to 231Th; SF7/20.38
236U236.0455612.34 x 107 yα to 232Th; SF0
237U237.0487236.75 dβ to 237Np1/2
238U238.0507847 (23)4.46 x 109 yα to 234Th; SF0

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