Search results
Results from the WOW.Com Content Network
Phosphorus is a chemical element with the symbol P and the atomic number 15. All elemental forms of phosphorus are highly reactive and are therefore never found in nature. They can nevertheless be prepared artificially, the two most common ones being white phosphorus and red phosphorus.
Metallurgists Percy Gilchrist (1851–1935) and Sidney Gilchrist Thomas (1850–1885) invented the Gilchrist–Thomas process, which enabled the use of high phosphorus acidic Continental ores for steelmaking. The dolomite lime lining of the converter turned in time into calcium phosphate, which could be used as fertilizer, known as Thomas ...
The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based materials do not enter the gaseous phase readily, [1] as the main source of gaseous phosphorus ...
Phosphorus condenses to a liquid below about 280°C and then solidifies (to the white phosphorus allotrope) below about 44°C (depending on purity). This same essential reaction is still used today (but with mined phosphate ores, coke for carbon, and electric furnaces). Brand's process yielded far less phosphorus than it could have.
The U.S. now uses white phosphorus in artillery shells to produce smoke and conceal troop movements and to create light and illuminate the battlefield. The Pentagon recommendation was to provide ...
While the cause was linked to the use of white phosphorus within 5 years, it took almost a century of strikes, bans, and taxes to stop its use in the industry. Image credits: Flares117 #19
Phosphorus (P) 15 φῶς + φόρος (phos + phoros) Greek via Latin [14] "light-bearer" descriptive From Greek φῶς + φόρος (phos + phoros), which means "light bearer", because white phosphorus emits a faint glow upon exposure to oxygen. Phosphorus was the ancient name for Venus, or Hesperus, the Morning Star. [3] Sulfur (S) 16 Old ...
A U.S.-led military coalition also deployed white phosphorus weapons in Syria and Iraq in its war against ISIS in 2017, according to HRW. Israel, too, previously used the substance during a 2008 ...