Periodic Table of the Elements Phosphorus

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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

Periodic Table of the Elements: Phosphorus
Atomic Number: 15
Atomic Symbol: P
  Phosphorus
Atomic Weight: 30.97376
Electron Configuration: 2 · 8 · 5