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Information valid for Bi-209 unless otherwise noted

Basic Information

Symbol: Bi
Atomic Number: 83
Mass: 208.98038
Melting Point: 271.3 C
Boiling Point: 1560.0 C
Number of Protons/Electrons: 83
Number of Neutrons: 126
Classification: Other Metals
Crystal Structure: Rhombohedral
Density @ 293 K: 9.8 g/cm3
Color: white

Atomic Structure

[Bohr Model of Bismuth]
Number of Energy Levels: 6

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 18
    Sixth Energy Level: 5


Isotope Half Life
Bi-202 1.7 hours
Bi-204 11.2 hours
Bi-205 15.3 days
Bi-206 6.24 days
Bi-207 32.0 years
Bi-208 368000.0 years
Bi-209 Stable
Bi-210 5.0 days
Bi-210m 3000000.0 years
Bi-211 2.1 minutes
Bi-212 1.0 hour
Bi-213 45.6 minutes
Bi-214 19.9 minutes
Bi-215 7.0 minutes


Date of Discovery: Known to the ancients
Discoverer: Unknown
Name Origin: From the German word wissmuth (white mass)
Uses: pharmaceuticals, fuses
Obtained From: bismuthine