Phosphorus (P)

Atomic Number: 15

Relative Atomic Mass: 30.9737622


Electronegativity: 2.19


Atomic Radius (Picometers): 100

Appearance: Red, White, Yellow, Colourless and More

Occurrence: Natural


Melting Point (Kelvin): White - 317.4 
                                        Black - 883.2

Boiling Point (Kelvin): White - 553.7


Stable Isotopes: 31

Discoverer: Hennig Brandt in 1669

Properties: White - Very Reactive, Very Volatile, Very Toxic

                    Red - Fire Retardant

                   Black - Low Reactivity

First Use: Matches (19th Century)

Modern Uses: Water Softening

Pictures Courtesy of BXXXD, Tomihahndorf, Maksim and Materialscientist


©2011 Grant Dwyer