Definition: Arsenic - a mineral that contains arsenic, a group of heavy metals used in industrial processes or as an ingredient in medicines. Definition: - Arsenium - 81 atoms of carbon with 29 protons and 30 neutrons. It is a metalloid and one of the few elements that can form single bonds (like those found between covalent bonds like H-H in water). This means it can be oxidized to form various elements or re-氧化生成化合物。 - Arsenic - The chemical element with atomic number 81, which is commonly represented as As. It has the symbol Ag and its name comes from the Greek word 'arsen' meaning "red" (like red blood cells), and 'acid' in Latin. - Aserinous - a compound that contains arsenic and is a metallic element.
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