Information valid for P-31 unless otherwise noted

Phosphorous

Basic Information

Symbol: P
Atomic Number: 15
Mass: 30.97376
Melting Point: 44.1 C
Boiling Point: 280.0 C
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

Number of Energy Levels: 3 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 5

Isotopes

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