Uran

92
U
Gruppe
n/a
Periode
7
Block
f
Protonen
Elektronen
Neutronen
92
92
146
Generelle Eigenschaften
Ordnungszahl
92
Atommasse
238,02891
Massenzahl
238
Kategorie
Actinoide
Farbe
Silber
Radioaktiv
Ja
Named after the planet Uranus
Kristallstruktur
Orthorhombisch basiszentriert
Geschichte
Uranium was discovered in 1789 by the German chemist Martin Heinrich Klaproth.

In 1841, Eugène-Melchior Péligot isolated the first sample of uranium metal by heating uranium tetrachloride with potassium.

Antoine Henri Becquerel discovered radioactivity by using uranium in 1896.
Elektronen pro Schale
2, 8, 18, 32, 21, 9, 2
Elektronenkonfiguration
[Rn] 5f3 6d1 7s2
U
Uranium-235 was the first isotope that was found to be fissile
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
18,95 g/cm3
Schmelzpunkt
1405,35 K | 1132,2 °C | 2069,96 °F
Siedepunkt
4404,15 K | 4131 °C | 7467,8 °F
Schmelzwärme
14 kJ/mol
Verdampfungswärme
420 kJ/mol
Spezifische Wärmekapazität
0,116 J/g·K
Häufigkeit in der Erdkruste
0,00018%
Häufigkeit im Universum
2×10-8%
A
Danksagungen für Bilder: Wikimedia Commons (Zxctypo)
A billet of highly enriched uranium
CAS-Nummer
7440-61-1
PubChem CID Number
23989
Atomeigenschaften
Atomradius
156 pm
Kovalenter Radius
196 pm
Elektronegativität
1,38 (Pauling-Skala)
Ionisierungsenergie
6,1941 eV
Molares Volumen
12,59 cm3/mol
Wärmeleitfähigkeit
0,276 W/cm·K
Oxidationszustände
3, 4, 5, 6
Anwendung
Uranium is used as fuel for nuclear power plants.

Uranium is used as a colorant in uranium glass, producing orange-red to lemon yellow hues.

It was also used for tinting and shading in early photography.

The major application of uranium in the military sector is in high-density penetrators.
Uranium is toxic and highly radioactive
Isotope
Stabile Isotope
-
Instabile Isotope
215U, 216U, 217U, 218U, 219U, 220U, 221U, 222U, 223U, 224U, 225U, 226U, 227U, 228U, 229U, 230U, 231U, 232U, 233U, 234U, 235U, 236U, 237U, 238U, 239U, 240U, 241U, 242U