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Phosphorus. Phosphorus is a chemical element; it has symbol P and atomic number 15. 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 a concentration in the Earth's crust of about one gram per kilogram [citation ...
Phosphorus is the 15th element in the periodic table and has a symbol of P and atomic number of 15. It has an atomic weight of 30.97376 and a mass number of 31. Phosphorus has fifteen protons and sixteen neutrons in its nucleus, and fifteen electrons in three shells.
Element Phosphorus (P), Group 15, Atomic Number 15, p-block, Mass 30.974. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Phosphorus (P) has an atomic mass of 15. Find out about its chemical and physical properties, states, energy, electrons, oxidation and more.
29 Αυγ 2023 · Phosphate ion is a reasonably strong base. It hydrolyzes in water to form a basic solution. \[\ce{PO4^{3-}(aq) + H2O(l) <=> HPO4^{2-}(aq) + OH^{-}(aq)} \nonumber \] with \(K_b = 1.0 \times 10^{-2}\) \[\ce{HPO4^{2-}(aq) + H2O(l) <=> H2PO4^{-}(aq) + OH^{-}(aq)} \nonumber \] with \(K_b = 1.6 \times 10^{-7}\)
Phosphorus is a nonmetal, solid at room temperature, and a poor conductor of heat and electricity. Phosphorus occurs in at least 10 allotropic forms, the most common (and reactive) of which is so-called white (or yellow) phosphorus, which looks like a waxy solid or plastic.
Table \(\PageIndex{2}\) lists the ion names and ion formulas of the most common polyatomic ions. For example, \(\ce{NO3^{−}}\) is the nitrate ion; it has one nitrogen atom and three oxygen atoms and an overall 1− charge.
