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Francium at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page


Basic Information


Name: Francium
Symbol: Fr
Atomic Number: 87
Atomic Mass: (223.0) amu
Melting Point: 27.0 °C (300.15 K, 80.6 °F)
Boiling Point: 677.0 °C (950.15 K, 1250.6 °F)
Number of Protons/Electrons: 87
Number of Neutrons: 136
Classification: Alkali Metal
Crystal Structure: Cubic
Density @ 293 K: 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-21220.0 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

I currently do not know of any links for Francium. If you do, please let me know

MLA Format for Citing This Page


Bentor, Yinon. Chemical Element.com - Francium. <http://www.chemicalelements.com/elements/fr.html>.

For more information about citing online sources, please visit the MLA's Website.

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