Template:Infobox einsteinium

Einsteinium,  ₉₉Es

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery; glows blue in the dark
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Einsteinium in the periodic table
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Atomic number (Z)	99
Group	Template:Infobox element/group
Period	period 7
Block	f-block
Element category	Template:Infobox element/category format
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	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.3
[[Ionization energy|Template:Engvar energies]]	1st: 619 kJ/mol
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Magnetic ordering	paramagnetic
CAS Number	7429-92-7
History
Naming	after Albert Einstein
Discovery	Lawrence Berkeley National Laboratory (1952)
Main isotopes of einsteinium
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