1/4/2024 0 Comments Antimony defineRed phosphorus has a chain like polymeric structure, and is more stable. Red phosphorus is less reactive than white phosphorus. Red phosphorous forms when white phosphorous is heated to 573 Kelvin and not exposed to air. White phosphorus is toxic, while red phosphorus is nontoxic. White phosphorus is a white, waxy solid that can be cut with a knife. Phosphorus exhibits allotropic forms: the most common forms at room temperature are white phosphorus and red phosphorus. These include compounds such as fluorapatite (Ca 5(PO 4) 3F), which in fluoridated water is used to strengthen teeth, and hydroxylapatite (Ca 10(OH) 2(PO4) 6), a major component of tooth enamel and bone material. Phosphorous is not found pure in nature, but in the form of apatite ores. The main source of phosphorus compounds is phosphorus rocks. Phosphorus is the eleventh most abundant element, making up 0.11% of the earth's crust. The most common oxidation state of phosphorus is -3. Hydrazine is a good reducing agent, and methyl hydrazine is commonly used as a rocket fuel. Hydrazine, N 2H 4, is a poisonous, colorless liquid that explodes in air. ![]() ![]() Nitrogen oxide is found in smog and neurotransmitters. Nitrous oxide, also called “laughing gas,” is used in dental work, child birth, and to increase the speed of cars. The oxides and oxyacids of nitrogen include nitrous oxide (N 2O), nitrogen oxide (NO), and nitrogen dioxide (NO 2).
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