Phosphorus (P)
Symbol P
Atomic Number 15
Atomic Mass 30.974
Discovered by Phosphorus was discovered by Hennig Brandt

Chemical Properties

Group 15   Melting point 44.15°C, 111.47°F, 317.3 K
Period 3 Boiling point 280.5°C, 536.9°F, 553.7 K  
Block p Density (g cm−3) 1.823 (white)
Atomic number 15 Relative atomic mass 30.974   
State at 20°C Solid Key isotopes 31P
Electron configuration [Ne] 3s3p3 CAS number 7723-14-0  
ChemSpider ID 4575369 ChemSpider is a free chemical structure database

What is Phosphorus?

  • Despite the fact that for thousands of years people have been using the periodic table with phosphorus (P) in it, it was not until 1669 that it was secluded and termed by a chemist named Brand.
  • Phosphorus is an element that one will under no circumstances find freely in our environment. It is extremely reactive.

Uses Of Phosphorus

  • There are four forms of phosphorous usually used these days: white, black, red, and violet.
  • It’s simple to spot phosphorus at position number fifteen on the periodic table just under nitrogen (N).
  • One can also find phosphorus in fireworks, fertilizers, and baking powder.
  • Phosphorus also plays a role in the making of steel.
  • Phosphates are also used in the production of fine chinaware and special glasses.

Practise This Question

In the gaseous state, PCl5 exists in the form of trigonal bipyramidal. In the structure, all the bonds are of equal length and can be treated equivalent. True or False?