Backyard Landscaping ideas

What is red and white phosphorus with such different properties?

Two important allotropes white and red phosphorus. White phosphorus, P4, has a melting point of 44.1 C and spontaneously reacts with oxygen. Red phosphorus, a solid network, melts at 280 C and is stable in the air. Use your knowledge or intermolecular and intramolecular bond to explain why these two forms of the same element have such different properties?

White phosphorus, or yellow phosphorus, or simply tetraphosphorus (P4) exists as molecules composed of four atoms. The tetrahedral arrangement results in the deformation of the ring and instability. The molecule is described as a unique set of six of the PP bonds. Two different crystalline forms are known. The form α, that is stable under normal conditions, is structured body-centered cubic crystal. Reversibly transforms into the β form at 195.2 K. The β form is believed which have a hexagonal crystal structure. Red phosphorus can be formed by heating white phosphorus to 250 ° C (482 ° F) or by exposing white phosphorus to sunlight. Red phosphorus exists as an amorphous network. When heated again, the crystallized amorphous red phosphorus. Red phosphorus does not turn on the air at temperatures less than 240 ° C, whereas white phosphorus ignites about 30 ° C.

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What are some very rare or almost unheard of, the types of dogs?

What are some very rare or almost unheard of, the types of dogs? I draw some dogs, but I will not draw dogs like collies, and cocker spaniel, or shepherd dog, etc … I wish that some dogs may not look odd, but their races are rare or rarely heard of, thank you! preferably dogs with long or medium hair, not short. I like to draw more, and I get a little better too. Tulip? What are those numbers?

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