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Information valid for Cf-251 unless otherwise noted

Basic Information

Symbol: Cf
Atomic Number: 98
Mass: (251.0)
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 98
Number of Neutrons: 153
Classification: Rare Earth
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown

Atomic Structure

[Bohr Model of Californium]
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: 28
    Sixth Energy Level: 8
    Seventh Energy Level: 2


Isotope Half Life
Cf-245 44.0 minutes
Cf-246 1.5 days
Cf-247 3.1 hours
Cf-248 334.0 days
Cf-249 351.0 years
Cf-250 13.0 years
Cf-251 900.0 years
Cf-252 2.6 years
Cf-253 17.8 days
Cf-254 60.5 days


Date of Discovery: 1950
Discoverer: G.T. Seaborg
Name Origin: California (State and University)
Uses: No uses known
Obtained From: Man-made