• Class: Alkalis
• Period: 7
• IUPAC group: 1
• Traditional: Ia

• Discovered in: 1939 by Perey
• Origin of name: France
• Historical or alternate name:

Uranium ores

• Atmosphere: ~0.0 ppm
• Primitive mantle: ~0.0 ppm
• Sea water: ~0.0 ppm
• Metallic meteorite: ~0.0 ppm
• ConTinental crust: ~0.0 ppm
• Solar photosphere: ~0.0 log of abundance
• Oceanic crust: ~0.0 ppm
• Solar system: ~0.0 relative to Si=1.0e6

   Hazards

Radioactive..

• Lower:
• Upper:

Francium Physical Properties

 Transitional Data

• State: Liquid
• Density: 2.41 g/cm3

 Molar enthalpy

• Atomization: 75.0 kJ mol-1
• Fusion: kJ mol-1
• Vaporization: kJ mol-1

 Transition points

• MelTing point: 294.4 K
• Boiling point: 930.0 K
• Critical temperature: 1743.0 K

 Molar properties

• Atomic weight: 223.0197 g/mole
• Molar volume: cm3 mol-1

 Crystal structure sequence

 Thermodynamics

• State: solid
  • Enthalpy 0
  • Gibbs function 0
  • Entropy 95.4
  • Heat Capacity

• State: gas
  • Enthalpy 72.8
  • Gibbs function
  • Entropy
  • Heat Capacity

 Miscellaneous physical

• Electrical resistivity: µ-ohms/cm
• Debye temperature: K
• Thermal conductivity: W / m / K
• Coefficient of linear expansion: Coef. per K
• Mass magnetic susceptibility:
• X-ray diffraction mass absorption coefficients:
• CuK: (µ/p)/cm2 g-1
• MoK: (µ/p)/cm2 g-1

Francium Chemical Properties

 Chemical basics:

• Oxidation states: +1
• Molecular wt: 223.0197 g/mole

 Radii

• Covalent: pm
• Atomic: 282.0 pm
• Van der Waals: pm

 Ions:

• ion: +1 pm 180.0

 Covalent bonds

 Effective nuclear charge

• Slater: 2.20
• Clementi:
• Froese-Fischer:

 Electronegativity

• Pauling: 0.7
• Allred-Rochow: 0.86

 Standard reactions

Francium Nuclear Properties

• Known 21
• Listed 0

• Known 204 - 224
• Listed

Francium Energy Properties

Electrons

• Ground state electron configuration: [Rn] 7s1
• Electron affinity: 44 kJ mol-1
• Filling orbitals:

 Ionization energies

 Atomic energy levels