Difference between revisions of "Uranium"

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===Further reading===
 
===Further reading===
*{{citation | first1 = Ingmar | last1 = Grenthe | first2 = Janusz | last2 = Droz˙dz˙yn´ ski | first3 = Takeo | last3 = Fujino | first4 = Edgar C. | last4 = Buck | first5 = Thomas E. | last5 = Albrecht-Schmitt | first6 = Stephen F. | last6 = Wolf | contribution = Uranium | title = The Chemistry of the Actinide and Transactinide Elements | editor1-first = Lester R. | editor1-last = Morss | editor2-first = Norman M. | editor2-last = Edelstein | editor3-first = Jean | editor3-last = Fuger | edition = 3rd | year = 2006 | volume = 1 | publisher = Springer | location = Dordrecht, the Netherlands | chapter = 5 | pages = 253–698 | url = http://radchem.nevada.edu/classes/rdch710/files/uranium.pdf | doi = 10.1007/1-4020-3598-5_5}}.
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*{{citation | first1 = Ingmar | last1 = Grenthe | first2 = Janusz | last2 = Drożdżyński | first3 = Takeo | last3 = Fujino | first4 = Edgar C. | last4 = Buck | first5 = Thomas E. | last5 = Albrecht-Schmitt | first6 = Stephen F. | last6 = Wolf | contribution = Uranium | title = The Chemistry of the Actinide and Transactinide Elements | editor1-first = Lester R. | editor1-last = Morss | editor2-first = Norman M. | editor2-last = Edelstein | editor3-first = Jean | editor3-last = Fuger | edition = 3rd | year = 2006 | volume = 1 | publisher = Springer | location = Dordrecht, the Netherlands | chapter = 5 | pages = 253–698 | url = http://radchem.nevada.edu/classes/rdch710/files/uranium.pdf | doi = 10.1007/1-4020-3598-5_5}}.
  
 
==External links==
 
==External links==

Revision as of 08:00, 14 April 2011

protactiniumuraniumneptunium
Nd

U

Atomic properties
Atomic number 92
Standard atomic weight 238.028 91(3)
Electron configuration [Rn] 5f3 6d1 7s2
Physical properties[1][2]
Melting point 1130 °C (1400 K)
Boiling point 3930 °C (4200 K)
Density 19.05 g cm−3
Electric resistivity 28 × 10−6 Ω cm
Chemical properties[3]
Electronegativity 1.38 (Pauling)
Atomic radii[1][4][5]
Covalent radius 196 pm
Metallic radius 156 pm
Ionic radius 87 pm (U6+, Oh)
103 pm (U4+, Oh)
Thermodynamic properties[1][6]
Standard entropy 50.20(20) J K−1 mol−1
Enthalpy change of atomization 533(8) kJ mol−1
Entropy change of atomization 149.59(22) J K−1 mol−1
Enthalpy change of fusion 12.6 kJ mol−1
Enthalpy change of vaporization 417 kJ mol−1
Hazards[7]
GHS pictograms Acute Tox. 2STOT RE 2
GHS signal word DANGER
GHS hazard statements H330, H300, H373, H413
Miscellaneous
CAS number 7440-61-1
EC number 231-170-6
Where appropriate, and unless otherwise stated, data are given for 100 kPa (1 bar) and 298.15 K (25 °C).

Uranium (symbol: U) is a member of the actinoid series of chemical elements.

Notes and references

Notes

References

  1. 1.0 1.1 1.2 Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 1450–86. ISBN 0-08-022057-6.
  2. Electrical resistivities. In Kaye & Laby Tables of Physical & Chemical Constants, 16th ed., 1995; Chapter 2.6.1, <http://www.kayelaby.npl.co.uk/general_physics/2_6/2_6_1.html>. (accessed 4 April 2011).
  3. Allred, A. L. Electronegativity values from thermochemical data. J. Inorg. Nucl. Chem. 1961, 17 (3–4), 215–21. DOI: 10.1016/0022-1902(61)80142-5.
  4. Cordero, Beatriz; Gómez, Verónica; Platero-Prats, Ana E.; Revés, Marc; Echeverría, Jorge; Cremades, Eduard; Barragán, Flavia; Alvarez, Santiago Covalent radii revisited. Dalton Trans. 2008 (5), 2832–38. DOI: 10.1039/b801115j.
  5. Shannon, R. D. Revised effective ionic radii and systematic studies of interatomic distances in halids and chalcogenides. Acta Crystallogr. A 1976, 32 (5), 751–67. DOI: 10.1107/S0567739476001551.
  6. Cox, J. D.; Wagman, D. D.; Medvedev, V. A. CODATA Key Values for Thermodynamics; Hemisphere: New York, 1989. ISBN 0891167587, <http://www.codata.org/resources/databases/key1.html>.
  7. Index no. 092-001-00-8 of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 446.

Further reading

External links

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