Arsenic is a metalloid (English called Metalloid), which is between the metallic and non-metallic elements in the periodic table, and boron, silicon, germanium, arsenic, antimony, bismuth and antimony. Metals are similar to metals in some physical properties (such as gloss) and chemical properties, but are not the same as metals in other physical properties (such as electrical conductivity). Although arsenic is not a metal, its toxicity is similar to that of heavy metals. Therefore, when heavy metal poisoning is said, arsenic is usually included.
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