Boron (B)

Atomic Number: 5

Relative Atomic Mass: 10.8117

Electronegativity: 2.04


Atomic Radius (Picometers): 85


Appearance: Black-Brown


Occurrence: Natural

Melting Point (Kelvin): 2349

Boiling Point (Kelvin): 4200

Stable Isotopes: 10, 11


Discoverer: Joseph Louis Gay-Lussac and Sir Humphry Davy in 1808

Properties: Good Electrical Conductor at High Temperatures, Electron-Deficient 

First Use: Ceramics (300)

Modern Uses: Control Rods in a Nuclear Reactor, Semiconductors, Magnets

Picture Courtesy of Xvazquez


©2011 Grant Dwyer