Template:Infobox einsteinium

Einsteinium, ₉₉Es

Einsteinium
Pronunciation	/aɪnˈstaɪniəm/ ​(eyen-STY-nee-əm)
Appearance	silvery; glows blue in the dark
Mass number	[252]
Einsteinium 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 Ho ↑ Es ↓ (Upt) californium ← einsteinium → fermium
Atomic number (Z)	99
Group	group n/a
Period	period 7
Block	f-block
Element category	f-block
Electron configuration	[Rn] 5f11 7s2
Electrons per shell	2, 8, 18, 32, 29, 8, 2
Physical properties
Phase at STP	solid
Melting point	1133 K ​(860 °C, ​1580 °F)
Boiling point	1269 K ​(996 °C, ​1825 °F) (estimated)
Density (near r.t.)	8.84 g/cm3
Atomic properties
Oxidation states	+2, +3, +4
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 619 kJ/mol
Spectral lines of einsteinium
Other properties
Natural occurrence	synthetic
Crystal structure	​face-centered cubic (fcc)
Magnetic ordering	paramagnetic
CAS Number	7429-92-7
History
Naming	after Albert Einstein
Discovery	Lawrence Berkeley National Laboratory (1952)
Main isotopes of einsteinium
Iso­tope Abun­dance Physics:Half-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 –

Es data m.p. cat
	in	calc from C	diff	report	ref
C	860	—	—
K	1133	1130	3
F	1580	1580	0
max precision	0
WD
input	C: 860, K: 1133, F: 1580
comment

Es data b.p. cat
	in	calc from C	diff	report	ref
C	996	—	—
K	1269	1269	0
F	1825	1825	0
max precision	0
WD
input	C: 996, K: 1269, F: 1825
comment	(estimated)

PTChemistry:einsteinium

Cf ← i'box Cf	iso99Es  infobox  isobox	→ Fm i'box Fm
Commons  Wikidata:Q1892  Wiktionary Indexes in PT: § below · Page

[]  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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