Compounds and Elements

World Encyclopedia The Columbia Encyclopedia, 6th ed. Further reading

phosphorus

World Encyclopedia | 2005 | Copyright

phosphorus (symbol P) Common nonmetallic element of group V of the periodic table, discovered in 1669 by German alchemist Hennig Brand (born c. 1630). It occurs (as phosphates) in many minerals; apatite being the chief source. The element is used in making phosphoric acid for detergents and fertilizers. Small amounts are used in insecticides and in matches. Phosphorus exhibits allotropy. Properties: at.no. 15; r.a.m. 30.9738; r.d. 1.82 (white), 2.34 (red); m.p. 44.1°C (111.38°F) (white); b.p. 280°C (536°F) (white); most common isotope P³¹ (100%).

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Periodic Table of the Elements: Phosphorus

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

Periodic Table of the Elements: Phosphorus

Periodic Table of the Elements: Phosphorus

Atomic Number:	15
Atomic Symbol:	P
	Phosphorus
Atomic Weight:	30.97376
Electron Configuration:	2 · 8 · 5

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"Periodic Table of the Elements: Phosphorus." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-P-ptblTABLE.html

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