Phosphorus at Chemical Elements.com 


 

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


Atomic Structure

[Bohr Model of Phosphorus]  
Number of Energy Levels: 3

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 5

Isotopes

Isotope Half Life
P-31 Stable
P-32 14.28 days
P-33 24.3 days

Facts


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