Boron at Chemical Elements.com 

 

Basic Information


Name: Boron
Symbol: B
Atomic Number: 5
Atomic Mass: 10.811 amu
Melting Point: 2300.0 °C (2573.15 °K, 4172.0 °F)
Boiling Point: 2550.0 °C (2823.15 °K, 4622.0 °F)
Number of Protons/Electrons: 5
Number of Neutrons: 6
Classification: Metalloid
Crystal Structure: Rhombohedral
Density @ 293 K: 2.34 g/cm3
Color: brownish


Atomic Structure

[Bohr Model of Boron]  
Number of Energy Levels: 2

    First Energy Level: 2
    Second Energy Level: 3

Isotopes

Isotope Half Life
B-10 Stable
B-11 Stable

Facts


Date of Discovery: 1808
Discoverer: Sir Humphry Davy, J.L Gay-Lussac
Name Origin: From borax and carbon
Uses: heat resistant alloys
Obtained From: kernite