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Es

Einsteinium

#99 · Actinide

I-Mass252.083 u
Uxinano8.84 g/cm³
Uthuthu1133.0 K
Ukomisa1269.0 K
Electronegativity1.3
Ionization energy619.0 kJ/mol
Atomic radius:203.0 pm
I-Blockf- iblock
Ilizwe (RT)I-Solid
Qwalasela[Rn] 5f11 7s2
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