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Text 5 PHOSPHORUS.
We know of the element phosphorus being located below nitrogen in group V of the Periodic Table. These two elements resemble each other in many respects, but there are many points in which, they differ radically. The most striking difference between these two elements is that nitrogen is quite inactive under ordinary conditions, while phosphorus reacts readily both with metals and non-metals. They differ also in that nitrogen is a gas at ordinary temperature, whereas phosphorus is a solid.
Ordinarily obtained phosphorus is a soft waxlike solid, while when first prepared but slowly turning yellow. It is called white phosphorus to distinguish it from the other aliotropic forms of the element. When heated much above the boiling point, the molecules begin to dissociate according to the reaction P4 -2P2, one percent of the molecules being dissociated at 800 and more than 50 percent at 1200. Phosphorus is almost insoluble in water, 0.0033g. dissolving in a litre of ice water, Phosphorus dissolves in many solvents, the best solvent being car bon disulfide, one part of which will dissolve nine parts of phosphorus.
Chemists know of phosphorus existing in several aliotropic forms, only two of them are of general interest. One is white phosphorus.
The most striking property of white phosphorus is its activity with oxygen.When exposed to air at room temperature the oxidation of phosphorus begins slowly, and as the temperature rises, spontaneous combustion may result, the ignition temperature ranging*** from 35° to 45° . Because of the ease with which it lakes fire, it must be left under water and such operation as culling and moulding should be performed there. Care should be taken never to handle phosphorus with bare hands as heat of the body is sufficient to ignite it.
White phosphorus is very poisonous, the effect may result in chronic poisoning if one remains long in an atmosphere containing the vapour. Red phosphorus being a more stable form, its reactions are much less violent. It does not ignite in the air until heated to a temperature of 240, but the products formed are the same produced by white phosphorus.

Господа, переводить не нужно. Я тут сама смогла, а вот на аннотацию ни времени, ни ума не хватает...
Заранее всем пасибки!!!