Information valid for Fr-223 unless otherwise noted
[ATOM]

Francium

 [ATOM]

Basic Information


Symbol: Fr
Atomic Number: 87
Mass: (223)
Melting Point: 27
Boiling Point: 677
Number of Protons/Electrons: 87
Number of Neutrons: 136
Classification: Alkali Metal
Crystal Structure: Cubic
Density: Unknown
Color: Unknown

Atomic Structure

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

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

Isotopes

Isotope Half Life
Fr-21220 minutes
Fr-2214.8 minutes
Fr-22214.3 minutes
Fr-22321.8 minutes

Facts


Date of Discovery: 1939
Discoverer: Marguerite Derey
Name Origin: After France
Uses: No uses known
Obtained From: decay of actinium

Related Links

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