Phosphorus

A non-metallic element. Applied to the inner face of a cathode ray tube that when bombarded with electrons will emit light of various colours.

Symbol

P

Discovered

In 1667 Hennig Brand accidentally discovers the element phosphorus during an experiment with urine, but he keeps it secret and Robert Boyle later discovers and describes the element.

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Atomic number	15		Clip
Atomic / Molecular Weight	30.97376	gmol-1	Clip
Density	(yellow) 1820	kgm-3	Clip
Lattice constant	331	fm	Clip
Melting Point	yellow 317.36	K	Clip
Boiling Point	553.56	K	Clip
Specific heat capacity	757 white, 670 red	Jkg-1K-1	Clip
Bulk Modulus of Rigidity	10.9e9 (red) 4.9e9 (white)	Nm-2	Clip

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See also: Periodic Table.