Basic Information

Name: Phosphorus 
Symbol: P 
Atomic Number: 15 
Atomic Mass: 30.97376 amu 
Melting Point: 44.1 °C (317.25 K, 111.38 °F) 
Boiling Point: 280.0 °C (553.15 K, 536.0 °F) 
Number of Protons/Electrons: 15 
Number of Neutrons: 16 
Classification: Non-metal 
Crystal Structure: Monoclinic 
Density @ 293 K: 1.82 g/cm3 
Color: white
Date of Discovery: 1669 
Discoverer: Hennig Brand 
Name Origin: From the Greek words phôs (light) and phoros (bearer) 
Uses: fertilizers, detergents 
Obtained From: phosphate rock