Einsteinium

Analytical testing dots

Einsteinium is a metallic synthetic element. On the periodic table, it is represented by the symbol Es and atomic number 99. It is the seventh transuranic element, and seventh in the series of Actinides.

 

General
Name, Symbol, Number einsteinium, Es, 99
Chemical series actinides
Group, Period, Block n/a, 7, f
Appearance silver-coloured
Standard atomic weight (252) g·mol-1
Electrons per shell 2, 8, 18, 32, 29, 8, 2
Physical properties
Phase solid
Density (near r.t.) 8.84 g·cm−3
Melting point 1133K
(860°C, 1580°F)
Atomic properties
Oxidation states 2, 3, 4
Electronegativity 1.3 (Pauling scale)
Ionization energies 1st: 619 kJ/mol
Miscellaneous
Magnetic ordering no data
CAS registry number 7429-92-7

 

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Analytical testing dots

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