It comes from phosporos or light bearer....
Phosphorus trichloride(PCI3)- An important manufacturing chemical
PCl3 is the chemical formula for phosphorous trichloride.
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It is Phosphorous pentafluoride.
The symbol for the element phosphorus is P. Phosphorous is not the name of an element but rather of an acid, H3PO3.
Phosphorous Trioxide
Phosphorous Pentaiodide
Phosphorous is found in group 15 on the Periodic Table of the Elements. This is called the Nitrogen group.
Phosphorus. Note there is no third letter 'o' in the name.
Phosphorous Trioxide
Red phosphorous
The name would be phosphorous tri-iodine