Uraniu
92
U
Grupă
n/a
Perioadă
7
Bloc
f
Protoni
Electroni
Neutroni
92
92
146
Proprietăți Generale
Număr atomic
92
Masă atomică
238,02891
Numar de masa
238
Categorie
Actinide
Culoare
Argint
Radioactive
Da
Numit după planeta Uranus
Structură cristalină
Bază Centrată Ortorombic
Istoric
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.
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.
Electroni pe nivelul de energie
2, 8, 18, 32, 21, 9, 2
Configurație electronică
[Rn] 5f3 6d1 7s2
Uranium-235 was the first isotope that was found to be fissile
Proprietăți Fizice
Fază
Solid
Densitate
18,95 g/cm3
Punct de topire
1405,35 K | 1132,2 °C | 2069,96 °F
Punct de fierbere
4404,15 K | 4131 °C | 7467,8 °F
Energie de fuziune
14 kJ/mol
Energie de evaporare
420 kJ/mol
Căldură specifică
0,116 J/g·K
Abundența în scoarța Pământului
0,00018%
Abundența în Univers
2×10-8%
Numarul CAS
7440-61-1
PubChem CID Number
23989
Proprietăți Atomice
Rază atomică
156 pm
Rază de covalență
196 pm
Electronegativitate
1,38 (Scara lui Pauling)
Potențial de ionizare
6,1941 eV
Volum molar
12,59 cm3/mol
Conductivitate termică
0,276 W/cm·K
Număr de oxidare
3, 4, 5, 6
Aplicații
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 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
Izotopi
Izotopi stabili
-Izotopi instabili
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