We Use Cookies
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. For more information, please review our cookie policy and privacy policy.
By choosing I Accept, you consent to our use of cookies and other tracking technologies.

Uranium (U)

From Wikipedia, the free encyclopediaUranium is a chemical element with symbol U and atomic number 92. It is a silvery-white 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 in the periodic table

SymbolU
Atomic number92
Group0
Period7
Blockf
Element categoryActinide

Physical properties

Phase at STPSolid
Density19.1 g/cm3
Atomic weight238.029 u
Melting point1405.3 K
1132.15 °C
2069.87 °F
Boiling point4404 K
4130.85 °C
7467.53 °F

Atomic properties

Electronegativity (Pauling Scale)1.38
Electron affinity50.94 kJ/mol
Oxidation states+1, +2, +3, +4, +5, +6
(an amphoteric oxide)
Ionization energies
1597.6 kJ/mol
21420 kJ/mol
31900 kJ/mol
43145 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Rn] 5f3 6d1 7s2
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f3 6s2 6p6 6d1 7s2
Electrons per shell2, 8, 18, 32, 21, 9, 2

History

Discovered1789
Discovered byMartin Heinrich Klaproth
Warning: Undefined variable $footer in /customers/a/d/1/periodictable.one/httpd.www/inc/footer.php on line 34