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Information valid for B-11 unless otherwise noted

Basic Information

Symbol: B
Atomic Number: 5
Mass: 10.811
Melting Point: 2300.0 C
Boiling Point: 2550.0 C
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

  1. First Energy Level: 2
    Second Energy Level: 3


Isotope Half Life
B-10 Stable
B-11 Stable


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