Template:Infobox fermium

Fermium, ₁₀₀Fm

Fermium
Pronunciation	/ˈfɜːrmiəm/ ​(FUR-mee-əm)
Mass number	[257]
Fermium in the periodic cairt
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 Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) 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 Gowd Mercur (element) Thallium Leid (element) 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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium Er ↑ Fm ↓ (Upb) einsteinium ← fermium → mendelevium
Atomic nummer (Z)	100
Group	group n/a
Period	period 7
Block	f-block
Element category	Actinide
Electron confeeguration	[Rn] 5f12 7s2
Electrons per shell	2, 8, 18, 32, 30, 8, 2
Pheesical properties
Phase at STP	solit (predictit)
Meltin pynt	1800 K ​(1527 °C, ​2781 °F) (predictit)
Atomic properties
Oxidation states	+2, +3
Electronegativity	Pauling scale: 1.3
Ionisation energies	1st: 627 kJ/mol (estimatit)
Ither properties
Naitural occurrence	synthetic
CAS Nummer	7440-72-4
History
Namin	efter Enrico Fermi
Diskivery	Lawrence Berkeley Naitional Laboratory (1952)
Main isotopes o fermium
Iso­tope Abun­dance Hauf-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 –

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1527	—	—
K	1800	1800	0
F	2781	2781	0
WD	!
input	C: 1527, K: 1800, F: 2781
comment	(predictit)

Check temperaturs Fm: na inpit for C, K, F.

References

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