FrZ =  87



Francium
From the French "France", meaning "Land of the Franks"
(AM) Atomic Mass 223  amu    Oxidation States +1
   (BP) Boiling Point -677  °C    (MP) Melting Point -27  °C
   (ρ) Density 2.4  g/cm3    Crystal Structure Body Centered Cubic
   ( χ ) Electronegativity 0.7    (AR) Atomic Radius n/a
   Physical State Liquid (C) Heat Capacity n/a
Electronic-Config [Rn]  7s1     (I1) First Ionization E 369.54  kJ/mol
   (ΔHvap) Heat of Vaporization 65  kJ/mol     (ΔHfus) Heat of Fusion 2  kJ/mol
   Year of Discovery 1939    Location of Discovery France
(E°) Standard Potential Fr+⇔ Fr (-2.900 V)
Stable isotopes None. All natural isotopes are radioactive
Discovered/Synthesized by Marguerite Catherine Perey
Natural Source The mineral/ore uranium and thorium minerals
Common Uses Studied in laser atom traps
Other Info Completed humankindís discoveries of naturally occurring elements
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