Uranium, 92U |
|
Pangucapan | (ewr-AY-nee-əm) |
---|
Wujud | Logam klawu semu pirak; kena oksidasi dadi ireng nalika kacambor karo udara |
---|
Bobot atom standar (Ar, standard) | 7002238028910000000♠238.02891(3)[1] |
---|
|
|
Atomic number (Z) | 92 |
---|
Group | group 3 |
---|
Period | period 7 |
---|
Blok | f-block |
---|
Konfigurasi èlèktron | [Rn] 5f3 6d1 7s2 |
---|
Electrons per shell | 2, 8, 18, 32, 21, 9, 2 |
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|
Phase at STP | padat |
---|
Melting point | 1405,3 K (1132,2 °C, 2070 °F) |
---|
Boiling point | 4404 K (4131 °C, 7468 °F) |
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Density (near r.t.) | 19,1 g/cm3 |
---|
when liquid (at m.p.) | 17,3 g/cm3 |
---|
Heat of fusion | 9,14 kJ/mol |
---|
Heat of vaporization | 417,1 kJ/mol |
---|
Molar heat capacity | 27,665 J/(mol·K) |
---|
Vapor pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
at T (K)
|
2325
|
2564
|
2859
|
3234
|
3727
|
4402
|
|
|
Oxidation states | 6, 5, 4, 3[2] (Oksida basa lemah) |
---|
Electronegativity | Pauling scale: 1,38 |
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Atomic radius | empirical: 156 pm |
---|
Covalent radius | 196±7 pm |
---|
Van der Waals radius | 186 pm |
---|
|
|
Crystal structure | ortorombik |
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Speed of sound thin rod | 3155 m/s (at 20 °C) |
---|
Thermal expansion | 13,9 µm/(m·K) (at 25 °C) |
---|
Thermal conductivity | 27,5 W/(m·K) |
---|
Electrical resistivity | 0,280 µ Ω·m (at 0 °C) |
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Magnetic ordering | paramagnetik |
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Young's modulus | 208 GPa |
---|
Shear modulus | 111 GPa |
---|
Bulk modulus | 100 GPa |
---|
Poisson ratio | 0,23 |
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CAS Number | 7440-61-1 |
---|
|
Isotope
|
Abundance
|
Half-life (t1/2)
|
Decay mode
|
Product
|
232U
|
syn
|
68,9 thn
|
SF
|
|
—
|
α
|
5,414
|
228Th
|
233U
|
syn
|
159.200 thn
|
SF
|
197,93[3]
|
—
|
α
|
4,909
|
229Th
|
234U
|
0,0054%
|
245.500 thn
|
SF
|
197,78
|
—
|
α
|
4,859
|
230Th
|
235U
|
0,7204%
|
7.038×108 thn
|
SF
|
202,48
|
—
|
α
|
4,679
|
231Th
|
236U
|
Kelumit
|
2,342×107 thn
|
SF
|
201,82
|
—
|
α
|
4,572
|
232Th
|
238U
|
99,2742%
|
4,468×109 thn
|
α
|
4,270
|
234Th
|
SF
|
205,87
|
—
|
ββ
|
|
| |
| references | in Wikidata |
Réferènsi
Daftar réferènsi bakal muncul jroning artikel utama.
- ↑ Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ↑ The Chemistry of the Actinide and Transactinide Elements: Third Edition by L.R. Morss, N.M. Edelstein, J. Fuger, eds. (Netherlands: Springer, 2006.)
- ↑ BNL-NCS 51363, vol. II (1981), pages 835ff