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Template:Infobox fermium

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Revision as of 15:55, 31 August 2024 by imported>Double sharp (Undid revision 1242328999 by Hydrogen astatide (talk) but here you are not seeing actual pure Fm - most of this is Yb)
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Fermium, 100Fm
Fermium
PronunciationTemplate:Infobox element/pronunciation/format
Mass number[257]
Fermium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Er
↑
Fm
↓
—
einsteinium ← fermium → mendelevium
Atomic number (Z)100
Groupf-block groups (no number)
Periodperiod 7
Block  f-block
Electron configuration[Rn] 5f12 7s2
Electrons per shell2, 8, 18, 32, 30, 8, 2
Physical properties
Phase at STPsolid (predicted)
Melting point1800 K ​(1500 °C, ​2800 °F) (predicted)
Density (near r.t.)9.7(1) g/cm3 (predicted)[1][lower-alpha 1]
Atomic properties
Oxidation statescommon: +3
+2[2]
ElectronegativityPauling scale: 1.3
Ionization energies
  • 1st: 629 kJ/mol
  • [3]
Other properties
Natural occurrencesynthetic
Crystal structure ​face-centered cubic (fcc)
Face-centered cubic crystal structure for fermium

(predicted)[1]
CAS Number7440-72-4
History
Namingafter Enrico Fermi
DiscoveryLawrence Berkeley National Laboratory (1953)
Isotopes of fermium
Main isotopes[4] Decay
Isotope abun­dance half-life (t1/2) mode pro­duct
252Fm synth 25.39 h α 248Cf
SF –
253Fm synth 3 d ε 253Es
α 249Cf
255Fm synth 20.07 h α 251Cf
SF –
257Fm synth 100.5 d α 253Cf
SF –
 Category: Fermium
| references

Template:Infobox element/element navigation

References

  1. ↑ 1.0 1.1 Fournier, Jean-Marc (1976). "Bonding and the electronic structure of the actinide metals". Journal of Physics and Chemistry of Solids. 37 (2): 235–244. Bibcode:1976JPCS...37..235F. doi:10.1016/0022-3697(76)90167-0.
  2. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 28. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
  3. ↑ Sato, Tetsuya K.; Asai, Masato; Borschevsky, Anastasia; Beerwerth, Randolf; Kaneya, Yusuke; Makii, Hiroyuki; Mitsukai, Akina; Nagame, Yuichiro; Osa, Akihiko; Toyoshima, Atsushi; Tsukada, Kazuki; Sakama, Minoru; Takeda, Shinsaku; Ooe, Kazuhiro; Sato, Daisuke; Shigekawa, Yudai; Ichikawa, Shin-ichi; Düllmann, Christoph E.; Grund, Jessica; Renisch, Dennis; Kratz, Jens V.; Schädel, Matthias; Eliav, Ephraim; Kaldor, Uzi; Fritzsche, Stephan; Stora, Thierry (25 October 2018). "First Ionization Potentials of Fm, Md, No, and Lr: Verification of Filling-Up of 5f Electrons and Confirmation of the Actinide Series". Journal of the American Chemical Society. 140 (44): 14609–14613. doi:10.1021/jacs.8b09068.
  4. ↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3) 030001. doi:10.1088/1674-1137/abddae.
  1. ↑ The density is calculated from the predicted metallic radius (Silva 2006, p. 1628) and the predicted close-packed crystal structure (Fournier 1976).