Search results
Results From The WOW.Com Content Network
White phosphorus, yellow phosphorus, or simply tetraphosphorus (P 4) is an allotrope of phosphorus. It is a translucent waxy solid that quickly yellows in light (due to its photochemical conversion into red phosphorus ), [ 2 ] and impure white phosphorus is for this reason called yellow phosphorus.
Phosphorus must have been awe-inspiring to an alchemist: it was a product of man, and seeming to glow with a "life force" that did not diminish over time (and did not need re-exposure to light like the previously discovered Bologna Stone). Brand kept his discovery secret, as alchemists of the time did, and worked with the phosphorus trying ...
Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. It has an occurrence in the Earth's crust of about 0.1%, generally occurring as phosphate in minerals.
It can cause “excruciating burns and lifelong suffering,” a Human Rights Watch spokesperson said.
White phosphorus, yellow phosphorus or simply tetraphosphorus (P 4) exists as molecules of four phosphorus atoms in a tetrahedral structure, joined by six phosphorus—phosphorus single bonds. [1] The free P 4 molecule in the gas phase has a P-P bond length of r g = 2.1994(3) Å as was determined by gas electron diffraction . [ 2 ]
Jöns Jacob Berzelius, who invented the modern chemical notation, discovered that the dangerous white phosphorus in matches could be replaced with the more benign red phosphorus, but was not able to produce a match reliable enough for everyday use. Pasch, a student of Berzelius, managed to do so by moving the phosphorus from the head of the ...
The Israeli military deployed white phosphorus, a controversial and lethal chemical substance, in its war against Hamas, putting civilians at risk of life-threatening burns, according to the Human ...
The US government is “certainly concerned” about the possibility that the Israeli military misused US-made white phosphorous munitions during an attack in southern Lebanon two months ago ...