Periodic Table of the Elements: Einsteinium

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Periodic Table of the Elements: Einsteinium
Atomic Number:99
Atomic Symbol:Es
 Einsteiniumeinsteinium
[for Albert Einstein], artificially produced radioactive chemical element; symbol Es; at. no. 99; mass no. of most stable isotope 252; m.p. about 860°C;; b.p. and sp. gr. unknown; valence +2, +3.
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Atomic Weight:(252)
Electron Configuration:2 · 8 · 18 32 · 29 8 · 2
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