Uranium

92
U
Gruppe
n/a
Periode
7
Blok
f
Protons
Electrons
Neutrons
92
92
146
General Properties
Atomnummer
92
Atommasse
238,02891
Mass Number
238
Kategori
Actinider
Farve
Silver
Radioactive
Ja
Named after the planet Uranus
Krystalstruktur
Endecentreret Orthohombisk
History
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.
Elektroner i hver skal
2, 8, 18, 32, 21, 9, 2
Elektronkonfiguration
[Rn] 5f3 6d1 7s2
U
Uranium-235 was the first isotope that was found to be fissile
Physical Properties
Tilstandsform
Fast stof
Massefylde
18,95 g/cm3
Smeltepunkt
1405,35 K | 1132,2 °C | 2069,96 °F
Kogepunkt
4404,15 K | 4131 °C | 7467,8 °F
Smeltevarme
14 kJ/mol
Fordampningsvarme
420 kJ/mol
Varmefylde
0,116 J/g·K
Abundance in Earth's crust
0,00018%
Abundance in Universe
2×10-8%
A
Billede akkrediteringer: Wikimedia Commons (Zxctypo)
A billet of highly enriched uranium
CAS Number
7440-61-1
PubChem CID Number
23989
Atomic Properties
Atomradius
156 pm
Kovalent radius
196 pm
Elektronegativitet
1,38 (Paulings skala)
Ionization Potential
6,1941 eV
Atomic Volume
12,59 cm3/mol
Varmeledningsevne
0,276 W/cm·K
Oxidationstrin
3, 4, 5, 6
Applications
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
Isotoper
Stable Isotopes
-
Unstable Isotopes
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