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Gray, or metallic arsenic, pictured under an argon atmosphere. Gray arsenic, also called grey arsenic or metallic arsenic, is the most stable allotrope of the element at room temperature, and as such is its most common form. [1] This soft, brittle allotrope of arsenic has a steel gray, metallic color, and is a good conductor. [2]
Arsenic is also a common n-type dopant in semiconductor electronic devices, and a component of the III–V compound semiconductor gallium arsenide. Arsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides, and insecticides. These applications are declining with the ...
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1900 English beer poisoning; 1976 Manfredonia accidental release of arsenic; 2007 Carancas impact event; A. Allotropes of arsenic; Angel Makers of Nagyrév; Aqua Tofana;
Arsenicin A is a naturally occurring arsenic heterocycle with the molecular formula C 3 H 6 As 4 O 3. It was first isolated from the New Caledonian marine sponge Echinochalina bargibanti . [ 1 ]
Arsenic trioxide powder.. Compounds of arsenic resemble in some respects those of phosphorus which occupies the same group (column) of the periodic table.The most common oxidation states for arsenic are: −3 in the arsenides, which are alloy-like intermetallic compounds, +3 in the arsenites, and +5 in the arsenates and most organoarsenic compounds.
The group 1 alkali metals and the group 2, alkaline earth metals, form arsenides with isolated arsenic atoms. They form upon heating arsenic powder with excess sodium gives sodium arsenide (Na 3 As). The structure of Na 3 As is complex with unusually short Na–Na distances of 328–330 pm which are shorter than in sodium metal.
Atomic number (Z): 33: Group: group 15 (pnictogens) Period: period 4: Block p-block Electron configuration [] 3d 10 4s 2 4pElectrons per shell: 2, 8, 18, 5: Physical properties; Phase at STP