This article is about the chemical element. For the article about Phosphorus meaning "morning star", go to Phosphorus (morning star). Phosphorus, (from the Greek language phôs meaning "light", and phoros meaning "bearer"), is the chemical element in the periodic table that has the symbol P and atomic number 15. A multivalent nonmetal of the nitrogen group, phosphorus is commonly found in inorganic phosphate rocks and in all living cells. Due to its high reactivity, it is never found as a free elemen ...

Including:

• Phosphorus - Notable characteristics
• Phosphorus - Forms
• Phosphorus - Applications
• Phosphorus - Biological role
• Phosphorus - History
• Phosphorus - Occurrence
• Phosphorus - Precautions
• Phosphorus - Isotopes
• Phosphorus - Spelling
• Phosphorus - Compounds

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - History, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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This is a particularly poisonous element with 50 mg being the average fatal dose (white phosphorus is generally considered to be the lethal form of phosphorus while phosphate and orthophosphate are essential nutrients). The allotrope white phosphorus should be kept under water at all times as it presents a significant fire hazard due to its extreme reactivity to atmospheric oxygen, and it should only be manipulated with forceps since contact with skin can cause severe burns. Chronic white phosphorus poisoning of unprotected workers leads to ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - History, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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This is a particularly poisonous element with 50 mg being the average fatal dose (white phosphorus is generally considered to be the lethal form of phosphorus while phosphate and orthophosphate are essential nutrients). The allotrope white phosphorus should be kept under water at all times as it presents a significant fire hazard due to its extreme reactivity to atmospheric oxygen, and it should only be manipulated with forceps since contact with skin can cause severe burns. Chronic white phosphorus poisoning of unprotected workers leads to ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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Common phosphorus forms a waxy white solid that has a characteristic disagreeable smell similar to that of garlic. Pure forms of the element are colorless and transparent. This nonmetal is not soluble in water, but it is soluble in carbon disulfide. Pure phosphorus ignites spontaneously in air and burns to phosphorus pentoxide. Phosphorus - Forms. Phosphorus exists in three allotropic forms: white , red, and black . Other allotropic forms may exist. The most common are red and white phosphorus, both of whi ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - History, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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White phosphorus is a common allotrope of the chemical element phosphorus which has found extensive military application as an incendiary agent [1], smoke-screening agent, and as an antipersonnel flame compound capable of causing serious burns[2]. It has been called a chemical weapon by many people and organizations, including the U.S. Department o ...

Including:

• White phosphorus weapon - Applications
• White phosphorus weapon - Smoke-screening agent
• White phosphorus weapon - Effects on humans
• White phosphorus weapon - Effects of exposure to WP weapons
• White phosphorus weapon - Exposure and inhalation of smoke
• White phosphorus weapon - Oral ingestion
• White phosphorus weapon - Arms control status
• White phosphorus weapon - Military regulations
• White phosphorus weapon - History
• White phosphorus weapon - Disposal at sea
• White phosphorus weapon - Use in Iraq
• White phosphorus weapon - Notes

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In Greek mythology, Hesperos (Greek Ἓσπερος (The Evening Star), sometimes Latinized as Hesperus) was a son of Eos, by either Atlas, Astraios or Cephalus. His Roman equivalent was Vesper. Hesperus - Variant Names. Hesperus is the personification of the evening star, the planet Venus. His name is sometimes conflated with the names Eosphorus (Εώσφορος, "bringer of dawn"; Latin Aurora) or Phosphorus (Φώσφορος, "bringer of light", translated as Lucifer ...

Including:

• Hesperus - Variant Names
• Hesperus - Hesperus is Phosphorus
• Hesperus - Neopagan Mythology

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Alternative biochemistry collectively refers to an assortment of astrobiology theories and hypotheses in which life is based on chemical systems other than those used by currently known forms of life. Proponents of such theories sometimes use the expression carbon chauvinism to disparage the assumption that carbon molecules are necessarily the basis for all life. Up to this point, however, no non-carbon based life-form has been discovered. Alternative biochemistry - Silicon biochemistry. The most com ...

Including:

• Alternative biochemistry - Silicon biochemistry
• Alternative biochemistry - Nitrogen/Phosphorus biochemistry
• Alternative biochemistry - Other exotic biochemical elements
• Alternative biochemistry - Non-water solvents
• Alternative biochemistry - Ammonia
• Alternative biochemistry - Other solvents
• Alternative biochemistry - Artificial life
• Alternative biochemistry - In fiction

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Arsenic is a chemical element in the periodic table that has the symbol As and atomic number 33. This is a notoriously poisonous metalloid that has three allotropic forms; yellow, black and grey. Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys. Arsenic - Notable characteristics. Arsenic is very similar chemically to its predecessor phosphorus, so much so that it will partly substitute for phosphorus in biochemical reactions and is thus poisonous. When hea ...

Including:

• Arsenic - Notable characteristics
• Arsenic - Applications
• Arsenic - History
• Arsenic - Occurrence
• Arsenic - Precautions
• Arsenic - Compounds
• Arsenic - Endnotes

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Biostimulation involves the modification of the environment to stimulate existing bacteria capable of bioremediation. This can be done by addition of various forms of limiting nutrients, such as phosphorus, nitrogen, or carbon (e.g. in the form of molasses). Additives are usually added to the subsurface through injection wells, although injection well technology for biostimulation purposes is still emerging. Removal of the contaminated material is also an option, albeit and expensive one. ...

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The germ is the "heart" of the cereal kernel, the embryo of the seed, and a concentrated source of several essential nutrients including Vitamin E, folate (folic acid), phosphorus, thiamin, zinc and magnesium. Along with bran, germ is often a by-product of the milling that produces refined grain products. Wheat germ, rice germ, maize germ, and others may be used to extract vegetable oil or directly as a food-making ingredient. The ger ...

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Armstrong's mixture is a highly sensitive primary explosive that is produced by mixing red phosphorus with potassium chlorate. Commercially, it is used in extremely small quantities on the paper caps that are used in toy cap guns. It is especially volatile when dry, and inexperienced pyrotechnicians who try to produce it often injure themselves severely in the attempt. Other related archivesphosphorus, potassium chlorate, primary explosive, pyrotechnicians

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WP may stand for: Wikipedia, the free online encyclopedia The Washington Post, a widely respected U.S. newspaper WordPress, PHP-based weblogging software Warsaw Pact White phosphorus incendiary weapons Weakest precondition in computer science Western Pacific Railroad, a former railroad in the United States Westfalenpost Water Polo WhatPulse, a free keycounting program Widespread Panic, a southern rock band from Athens, Georgia

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Crown glass is a type of optical glass used in lenses. It is produced from a special alkali-lime silicate incorporating a high amount of phosphorus pentoxide, and has a low refractive index and low dispersion (high Abbe number). Schott BK7 is an extremely common crown glass, used in precision lenses. It has good optical and mechanical characteristics, and is resistant to chemical and environmental damage. See also. Flint glass Borosilicate glass ...

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Siderite is also the name of a type of iron meteorite. Siderite is a mineral composed of iron carbonate FeCO3. It takes its name from the Greek word sideros, “iron”. It is a valuable iron mineral, since it is 48% iron and contains no sulfur or phosphorus. Both magnesium and manganese commonly substitute for the iron. Its crystals belong to the hexagonal system, and are rhombohedral in shape, typically with curved and striated faces. It also occurs in masses. Color ranges from yellow to dark brown or black, the ...

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Hydrobiology or aquatic ecology is the science of life processes in water. It is a sub-discipline of ecology. Traditionally it is closely related to limnology. One of the most important subjects of research is eutrophication. Special attention is paid to biotic interactions in plankton assemblage including the microbial loop, the mechanism of influencing water blooms, phosphorus load and lake turnover. Another subject of research is the acidification of mountain lakes. Long-term studies are carried out on changes in the ...

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• Hydrobiology - Field of Research Interests
• Hydrobiology - Organizations
• Hydrobiology - Journals

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Christian Friedrich Schönbein (October 18, 1799 – August 29, 1868) was a German-Swiss chemist who is most well-known for his discovery of guncotton. He also discovered ozone, a form of oxygen, in 1840 during the slow oxidation of white phosphorus and the electrolysis of water. Although his wife had forbidden him to do so, he occasionally experimented at home in the kitchen; one day in 1845, when his wife was away, he spilled a mixture of nitric acid and sulfuric acid. After using his wife's cotton apron to mop it up, he hung ...

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An ylide is a neutral molecule with positive and negative charges on adjacent atoms. The most common ylides are phosphonium ylides, used in the Wittig reaction for double bond synthesis from carbonyl groups (C=O). The positive charge in these Wittig reagents is carried by a phosphorus atom with three phenyl substituents and one bond to a carbon bearing a negative charge and two substituents, commonly alkyl groups. Ylides can be 'stabilised' or 'non-stabilised'. Non-stabilised ylides react readily with both aldehydes and ketones wherea ...

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Phosphorus normally occurs in nature as part of a phosphate ion, consisting of a phosphorus atom and some number of oxygen atoms, the most abundant form (called orthophosphate) having four oxygens: PO43-. Most phosphates are found as salts in ocean sediments or in rocks. Over time, geologic processes can bring ocean sediments to land, and weathering will carry terrestrial phosphates back to the ocean. Plants absorb phosphates from the soil. The plants may then be consumed by herbivores who in turn may be c ...

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Phosphorus cycle, Phosphorus cycle - Phosphorus in the environment, Phosphorus cycle - Human influence

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Phosphorus trichloride is prepared industrially by the reaction of chlorine with a refluxing solution of white phosphorus in phosphorus trichloride, with continuous removal of PCl3 as it is formed. In the laboratory it may be more convenient to use the less toxic red phosphorus[6]. P4 + 6 Cl2 → 4 PCl3 Industrial production of phosphorus trichloride is controlled under the Chemica ...

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Phosphorus trichloride, Phosphorus trichloride - Physical properties, Phosphorus trichloride - Chemical properties, Phosphorus trichloride - Preparation, Phosphorus trichloride - Uses, Phosphorus trichloride - Precautions, Phosphorus trichloride - Suppliers/Manufacturers

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