Classified as a nonmetal, Phosphorus is a solid at room temperature. 15. P. Phosphorus. Atomic Mass, 30.97376200 u. Electron Configuration ...

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.

Phosphorus is a monoisotopic element and its atomic weight is determined solely by its isotope 31P. The Commission last revised the standard atomic weight ...

Atomic number, 15, Relative atomic mass, 30.974 ; State at 20°C, Solid, Key isotopes · P ; Electron configuration, [Ne] 3s23p · CAS number, 7723-14-0.

Atomic Mass, 30.974 atomic mass units ; Number of Protons, 15 ; Number of Neutrons, 16 ; Number of Electrons, 15 ; Melting Point, 44.1° C.

Isotope · Relative Atomic Mass · Isotopic · Composition · Standard Atomic Weight · Notes. 15, P, 31, 30.973 761 998 42(70), 1, 30.973 761 998(5) ...

P is a radioactive isotope of phosphorus with relative atomic mass 31.973907 and half-life of 14.26 days. ... ^ "Standard Atomic Weights: Phosphorus".