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    Arsenic's history in science, medicine and technology has been overshadowed by its notoriety as a poison in homicides. Arsenic is viewed as being synonymous with toxicity.

  • Arsenic - Wikipedia

    Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal.Arsenic is a metalloid.It has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.. The primary use of arsenic …

  • ARSENIC AND ARSENIC COMPOUNDS (EHC 224, …

    1. SUMMARY 1.1 Properties and analytical procedures. Arsenic is a metalloid widely distributed in the earth’s crust and present at an average concentration of 2 mg/kg.

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    Abstract. Scattered literature is harnessed to critically review the possible sources, chemistry, potential biohazards and best available remedial strategies for a number of heavy metals (lead, chromium, arsenic, zinc, cadmium, copper, mercury and nickel) commonly found in contaminated soils.

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    It was discovered later that not all of the atoms of a particular element have the same mass. The different varieties (different number of neutrons, same number of protons) of the same element are called its isotopes. The atomic masses now appear in the Periodic Table is the average atomic mass weighted by the abundance of each isotope.

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