Fr | Z = 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 humankind’s discoveries of naturally occurring elements | |||
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