Uranyo

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Uranium
92U
Nd

U

(Uqq)
protactiniumuraniumneptunium
Appearance
silvery gray metallic; corrodes to a spalling black oxide coat in air
Two hands in brown gloves holding a blotched gray disk with a number 2068 hand-written on it
General properties
Name, simbolo, kaiphan uranium, U, 92
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category aktinido
Group, period, block [[group element|]], 7, f
Standard atomic weight 238.02891(3)
Electron configuration [Rn] 5f3 6d1 7s2
2, 8, 18, 32, 21, 9, 2
Electron shells of uranium (2, 8, 18, 32, 21, 9, 2)
History
Discovery Martin Heinrich Klaproth (1789)
First isolation Eugène-Melchior Péligot (1841)
Physical properties
Phase magahi
Density (near r.t.) 19.1 g·cm−3
Liquid density at m.p. 17.3 g·cm−3
Melting point 1405.3 K, 1132.2 °C, 2070 °F
Boiling point 4404 K, 4131 °C, 7468 °F
Heat of fusion 9.14 kJ·mol−1
Heat of vaporization 417.1 kJ·mol−1
Molar heat capacity 27.665 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2325 2564 2859 3234 3727 4402
Atomic properties
Oxidation states 6, 5, 4, 3[1], 2
(weakly basic oxide)
Electronegativity 1.38 (Pauling scale)
Ionization energies 1st: 597.6 kJ·mol−1
2nd: 1420 kJ·mol−1
Atomic radius 156 pm
Covalent radius 196±7 pm
Van der Waals radius 186 pm
Miscellanea
Crystal structure orthorhombic
Uranium has a orthorhombic crystal structure
Magnetic ordering paramagnetic
Electrical resistivity (0 °C) 0.280 µΩ·m
Thermal conductivity 27.5 W·m−1·K−1
Thermal expansion (25 °C) 13.9 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 3155 m·s−1
Young's modulus 208 GPa
Shear modulus 111 GPa
Bulk modulus 100 GPa
Poisson ratio 0.23
CAS registry number 7440-61-1
Most stable isotopes
Main article: Isotopes of uranium
iso NA half-life DM DE (MeV) DP
232U trace 68.9 y SF -
α 5.414 228Th
233U trace 1.592×105 y SF 197.93[2]
α 4.909 229Th
234U 0.005% 2.455×105 y SF 197.78
α 4.859 230Th
235U 0.720% 7.04×108 y SF 202.48
α 4.679 231Th
236U trace 2.342×107 y SF 201.82
α 4.572 232Th
238U 99.274% 4.468×109 y α 4.270 234Th
SF 205.87
ββ - 238Pu
t  h  u
· r

Ang uranyo (Iningles uranium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga U ug kaiphan nga atomik 92. Ang uranyo mao ang aktinido.

Ang mga gi basihan niini[usba | edit source]

  1. Morss, L.R.; Edelstein, N.M. and Fuger, J., ed. (2006). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Netherlands: Springer. ISBN 9048131464. 
  2. Magurno, B.A. ; Pearlstein, S, ed. (1981). Proceedings of the conference on nuclear data evaluation methods and procedures. BNL-NCS 51363, vol. II. Upton, NY (USA): Brookhaven National Lab.. pp. 835 ff, http://www.osti.gov/bridge//product.biblio.jsp?query_id=0&page=0&osti_id=5972980. 


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