Uranium (U)

General Properties

Symbol U
Atomic Number 92
Atomic Weight 238.02891
Group
(Actinoids)
Solid, Conductor, Actinide, Radioactive, Natural
Period 7
Block f

Physical Properties

Density 19.0 g/cm3
Atomic Volume 12.5 cm3/mole
Atomic Radius 1.38 angstroms
Covalent Radius --
Crust Abundance 0.00018%
Crystal Structure Orthorhombic
Color Silver

Energy

Electronegativity 1.4 (Pauling Scale)
Electron Affinity --
1st Ionization Energy 598 kJ/mol
2nd Ionization Energy 1420 kJ/mol
Specific Heat Capacity 0.12 J g−1 K−1
Thermal Conductivity 27.6 W·m−1·K−1

Electrons & Oxidation

Oxidation States +6,3,4,5
Electrons Per Shell 2 8 18 32 21 9 2
Electron Configuration [Rn] 5f3 6d1 7s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f3 6d1 7s2
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5f
↿ 
↿ 
↿ 
 
 
 
 
6s
↿⇂
6p
↿⇂
↿⇂
↿⇂
6d
↿ 
 
 
 
 
6f
 
 
 
 
 
 
 
7s
↿⇂
7p
 
 
 
7d
 
 
 
 
 
7f
 
 
 
 
 
 
 

Nuclear

Radioactive Yes
Half Life 4.471×109
Lifetime 6.4498×109y
Decay Alpha Emission

Media

Planetary Bohr Model of Uranium (U)
Lewis Dot Diagram of Uranium (U)
Description
Silvery-white, dense, ductile, malleable, radioactive metal.
Uses
For many centuries it was used as a pigment for glass. Now it is used as a fuel in nuclear reactors and in bombs.
Sources
Occurs in many rocks, but in large amounts only in such minerals as pitchblende and carnotite.
Pronounciation (English)
yoo-RAY-ni-em

Translations

Afrikaans Uraan
Aragonese Uranio
العربية يورانيوم
Armãneashte Uraniumu
asturianu Uraniu
azərbaycan dili Uran
български Уран
বাংলা ইউরেনিয়াম
brezhoneg Uraniom
bosanski Uranij[um]
Byelorussian Уран
Cebuano Uranyo
čeština Uran
Chuvash Уран
Cymraeg Urani
dansk Uran
Deutsch Uran
Ελληνικά Ουρανιο
English Uranium
esperanto Uranio
español Uranio
eesti Uraan
euskara Uranioa
فارسی اورانیم
suomi Uraani
føroyskt Uran
français Uranium
furlan Urani
West-Frysk Uranium
Gaeilge Úráiniam
Gàidhlig Uràiniam
galego Uranio
ગુજરાતી યુરેનિયમનો
Gaelg Uraanium
Hakka Chinese Yu (鈾)
עברית אורניום
हिन्दी युरेनियम
hrvatski Uranij
magyar Urán
հայերեն ՈՒրան
Indonesia Uranium
íslenska Úran
italiano Uranio
日本語 ウラン
ქართული ურანი
کٲشُر Ùran
қазақ тілі Уран
한국어 우라늄
Kurdish Uranyûm
Komi Уран
kernewek Uranyum
кыргызча Уран
Latin Uranium
Lëtzebuergesch Uran
Lombard Üràni
lingála Ulanu
lietuvių Uranas
latviešu Urāns
Mari Уран
Maori Konukarihi
македонски Ураниум
മലയാളം യുറേനിയം
монгол Уран
Мокшан Урани
Bahasa Melayu Uranium
Malti Uranju[m]
Nahuatl Ilhuicateōtepoztli
Nederlands Uranium, Uraan†
norsk Uran
Occitan Urani
ирон Уран
polski Uran
português Urânio
Runasimi Uranyu
română Uraniu
русский Уран
slovenčina Uran
slovenščina Uran
Samoan Dyurano
Samogitian Urans
shqip Uranium, ²Urani
српски Уран
Southern Sotho Uraniamo
svenska Uran
Kiswahili Urani
தமிழ் யுரேனியம்
Tajik Уран
ไทย ยูเรเนียม
Türkçe Uranyum
ئۇيغۇرچە ئۇران
українська Уран
o‘zbek Uran
Tiếng Việt Urani, Uran
Võro Uraan
中文

History

Discovered In
1789
Discovered By
Martin Klaproth
Discovered At
Germany
Word Origin
Named after the planet "Uranus"