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Information valid for Fm-257 unless otherwise noted

Basic Information

Symbol: Fm
Atomic Number: 100
Mass: (257.0)
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 100
Number of Neutrons: 157
Classification: Rare Earth
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown

Atomic Structure

[Bohr Model of Fermium]
Number of Energy Levels: 7

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 30
    Sixth Energy Level: 8
    Seventh Energy Level: 2


Isotope Half Life
Fm-249 3.0 minutes


Date of Discovery: 1953
Discoverer: Argonne, Los Alamos, University of California
Name Origin: After Enrico Fermi
Uses: No uses known
Obtained From: Man-made