Template:Infobox americium: Difference between revisions

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Latest revision as of 18:08, 11 November 2018

Americium,  95Am
Template:Infobox element/symbol-to-top-image-alt
General properties
PronunciationTemplate:Infobox element/pronunciation
Appearancesilvery white
Standard atomic weight (Ar, standard)Template:Infobox element/standard atomic weight
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Americium in the periodic table
Template:Infobox element/periodic table
Atomic number (Z)95
GroupTemplate:Infobox element/group
Periodperiod 7
Blockf-block
Element categoryTemplate:Infobox element/category format
Electron configuration[Rn] 5f7 7s2
Electrons per shell
2, 8, 18, 32, 25, 8, 2
Physical properties
Phase at STPsolid
Melting point1449 K ​(1176 °C, ​2149 °F)
Boiling point2880 K ​(2607 °C, ​4725 °F) (calculated)
Density (near r.t.)12 g/cm3
Heat of fusion14.39 kJ/mol
Molar heat capacity62.7 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.3
[[Ionization energy|Template:Engvar energies]]
  • 1st: 578 kJ/mol
Atomic radiusempirical: 173 pm
Covalent radius180±6 pm
Template:Infobox element/spectral lines
Other properties
Crystal structureTemplate:Infobox element/crystal structure
Thermal conductivity10 W/(m·K)
Electrical resistivity0.69 µΩ·m[1]
Magnetic orderingparamagnetic
Magnetic susceptibility+1000.0·10−6 cm3/mol[2]
CAS Number7440-35-9
History
Namingafter the Americas
DiscoveryGlenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Main isotopes of americium
Template:Infobox element/isotopes table
| references

Template:Infobox element/element navigation Template:Template reference list Expression error: Unrecognized word "template".

  1. Muller, W.; Schenkel, R.; Schmidt, H. E.; Spirlet, J. C.; McElroy, D. L.; Hall, R. O. A.; Mortimer, M. J. (1978). "The electrical resistivity and specific heat of americium metal". Journal of Low Temperature Physics. 30 (5–6): 561. Bibcode:1978JLTP...30..561M. doi:10.1007/BF00116197.
  2. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.