Template:Infobox einsteinium

Einsteinium, ₉₉Es

Einsteinium
Pronunciation	/aɪnˈstaɪniəm/ ​(eyen-STY-nee-əm)
Appearance	siller-coloured
Mass number	[252]
Einsteinium 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 Ho ↑ Es ↓ (Upu) californium ← einsteinium → fermium
Atomic nummer (Z)	99
Group	group n/a
Period	period 7
Block	f-block
Element category	Actinide
Electron confeeguration	[Rn] 5f11 7s2
Electrons per shell	2, 8, 18, 32, 29, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1133 K ​(860 °C, ​1580 °F)
Bylin pynt	1269 K ​(996 °C, ​1825 °F) (estimatit)
Density (near r.t.)	8.84 g/cm3
Atomic properties
Oxidation states	+2, +3, +4
Electronegativity	Pauling scale: 1.3
Ionisation energies	1st: 619 kJ/mol
Colour lines in a spectral range Spectral lines o einsteinium
Ither properties
Naitural occurrence	synthetic
Creestal structur	​face-centred cubic (fcc)
Magnetic orderin	paramagnetic
CAS Nummer	7429-92-7
History
Namin	after Albert Einstein
Diskivery	Lawrence Berkeley Naitional Laboratory (1952)
Main isotopes o einsteinium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 252Es syn 471.7 d α 248Bk ε 252Cf β− 252Fm 253Es syn 20.47 d SF – α 249Bk 254Es syn 275.7 d ε 254Cf β− 254Fm α 250Bk 255Es syn 39.8 d β− 255Fm α 251Bk SF –

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	860	—	—
K	1133	1130	3
F	1580	1580	0
WD	!
input	C: 860, K: 1133, F: 1580
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	996	—	—
K	1269	1269	0
F	1825	1825	0
WD	!
input	C: 996, K: 1269, F: 1825
comment	(estimatit)

References

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