Template:Infobox fermium

Fermium, ₁₀₀Fm

Fermium
Pronunciation	/ˈfɜːrmiəm/ ​(FUR-mee-əm)
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 ↓ (Upq) einsteinium ← fermium → mendelevium
Atomic number (Z)	100
Group	group n/a
Period	period 7
Block	f-block
Element category	f-block
Electron configuration	[Rn] 5f12 7s2
Electrons per shell	2, 8, 18, 32, 30, 8, 2
Physical properties
Phase at STP	solid (predicted)
Melting point	1800 K ​(1527 °C, ​2781 °F) (predicted)
Density (near r.t.)	9.7(1) g/cm3 (predicted)
Atomic properties
Oxidation states	+2, +3
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 629 kJ/mol
Other properties
Natural occurrence	synthetic
Crystal structure	​face-centered cubic (fcc) (predicted)
CAS Number	7440-72-4
History
Naming	after Enrico Fermi
Discovery	Lawrence Berkeley National Laboratory (1952)
Main isotopes of fermium
Iso­tope Abun­dance Physics:Half-life (t1/2) Decay mode Pro­duct 252Fm syn 25.39 h SF – α 248Cf 253Fm syn 3 d ε 253Es α 249Cf 255Fm syn 20.07 h SF – α 251Cf 257Fm syn 100.5 d α 253Cf SF –

Fm data m.p. cat
	in	calc from C	diff	report	ref
C	1527	—	—
K	1800	1800	0
F	2781	2781	0
max precision	0
WD
input	C: 1527, K: 1800, F: 2781
comment	(predicted)

Check temperatures Fm: no input for C, K, F.

PTChemistry:fermium

Es ← i'box Es	iso100Fm  infobox  isobox	→ Md i'box Md
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[]  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
most stable isotope
Natural occurrence
Phase at STP
Chemistry:Oxidation states
Spectral lines image
Physics:Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03) See also {{Infobox element/symbol-to--navbox}}

References

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