Periodic Table of the Elements: Arsenic

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Periodic Table of the Elements: Arsenic
Atomic Number:33
Atomic Symbol:As
 Arsenicarsenic
, a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.92160; m.p. 817°C; (at 28 atmospheres pressure); sublimation point 613°C;; sp. gr. (stable form) 5.73; valence −3, 0, +3, or +5.
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Atomic Weight:74.92160
Electron Configuration:2 · 8 · 18 · 5
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