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Arsenic Definition
Arsenic is an extremely poisonous metal. It is brittle and has a crystalline gray structure. As is the symbol for arsenic, 33 is the atomic number and 74.922 is the atomic weight. The melting point of arsenic is 817 ºC and the specific gravity is 5.73. The valence of arsenic is 3, 5. Arsenic is often used in alloy of copper.
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