Arsenic - Wikipedia
Arsenic is a chemical element with the symbol As and the atomic number 33. It is a metalloid and one of the pnictogens, and therefore shares many properties with its group 15 neighbors phosphorus and antimony. Arsenic is a notoriously toxic heavy metal.
Arsenic | Definition, Symbol, Uses, & Facts | Britannica
2024年12月29日 · Arsenic, a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms. Its chemical symbol is As, and it was first clearly identified as a free substance in 1649 by German pharmacist Johann Schroeder.
Arsenic - Element information, properties and uses | Periodic Table
Arsenic is a semi-metal. In its metallic form it is bright, silver-grey and brittle. Arsenic is a well-known poison. Arsenic compounds are sometimes used as rat poisons and insecticides but their use is strictly controlled. Surprisingly, arsenic can also have medicinal applications.
Arsenic Facts – Element As or 33 Recently updated - Science …
2023年12月3日 · Arsenic is a chemical element with the symbol As and atomic number 33, making it a part of the pnictogen or nitrogen group in the periodic table. This metalloid element is notorious for its toxicity. Arsenic exhibits a wide range of properties and plays diverse roles in both ancient and modern times.
Arsenic - Toxic, Reactions, Compounds | Britannica
2024年12月29日 · In its most stable elemental state, arsenic is a steel-gray, brittle solid with low thermal and electrical conductivity. Although some forms of elemental arsenic are metal-like, the element is best classified as a nonmetal.
Arsenic Facts: Chemical & Physical Properties - ThoughtCo
2019年7月3日 · Arsenic is found in its native state, in realgar and orpiment as its sulfides, as arsenides and sulfaresenides of heavy metals, as arsenates, and as its oxide. The most common mineral is Mispickel or arsenopyrite (FeSAs), which can be …
Clinician Brief: Arsenic | Environmental Health and Medicine …
2024年12月16日 · Arsenic is a naturally occurring element that is widely distributed in the Earth's crust. It is found in soil, mineral ores, groundwater, volcanic eruptions, and seafood. It is also used in many industrial processes, including metal smelting, wood preservation, and arsenical pesticide production and application.
Arsenic - Simple English Wikipedia, the free encyclopedia
Arsenic is chemical element 33 on the periodic table. Its symbol is As. Its atomic number is 33 and its atomic mass is 74.92. It is a toxic metalloid. It is in the pnictogen group on the periodic table. Arsenic is found in three allotropes. Gray arsenic is the most common. It is a brittle, somewhat soft metalloid that is a little shiny.
The Facts on Arsenic | Dartmouth Toxic Metals
What is Arsenic? Naturally occurring in the Earth’s crust and widely dispersed in the environment, arsenic is the 20th most abundant element. Arsenic Fact Sheet. In nature arsenic is usually found in sedimentary or igneous rock joined to or mixed with other elements, such as oxygen.
Arsenic (As) Element: Important Properties, Uses, Toxicity
2023年5月4日 · Arsenic is the metallic element with the atomic number 33 and is represented by the symbol ‘As’ in the periodic table. It is classified as a metalloid and belongs to the p-block of group 15 of the periodic table. It is a brittle silvery-grey semi metal. It has three allotropic forms yellow, black, and grey.