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This compound is generally regarded as stable, since at room temperature it decomposes only slowly. At temperatures of 250–300 °C decomposition to arsenic and hydrogen is rapid. [34] Several factors, such as humidity, presence of light and certain catalysts (namely aluminium) facilitate the rate of decomposition. [35]
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]
In its standard state arsine is a colorless, denser-than-air gas that is slightly soluble in water (2% at 20 °C) [1] and in many organic solvents as well. [citation needed] Arsine itself is odorless, [5] but it oxidizes in air and this creates a slight garlic or fish-like scent when the compound is present above 0.5 ppm. [6]
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.
Arsenic is a grey, metallic looking solid. It has a density of 5.727 g/cm 3 and is brittle, and moderately hard (more than aluminium; less than iron). [332] It is stable in dry air but develops a golden bronze patina in moist air, which blackens on further exposure. Arsenic is attacked by nitric acid and concentrated sulfuric acid.
Similarly, yellow arsenic is a molecular solid composed of As 4 units. [37] Some forms of sulfur and selenium are composed of S 8 (or Se 8 ) units and are molecular solids at ambient conditions, but converted into covalent allotropes having atomic chains extending throughout the crystal.
Joe Rogan said he feared he was being poisoned when arsenic was found in his blood but it came from eating too many sardines. A dietitian weighs in. ... sardines are also rich in protein and Omega ...
Arsenic is a moderately abundant element in Earth's crust, and although many arsenic compounds are often considered highly toxic to most life, a wide variety of organoarsenic compounds are produced biologically and various organic and inorganic arsenic compounds are metabolized by numerous organisms.