Element Family
Alkali
Alkali
Space Group Name
Not Available
Not Available
Space Group Number
Not Available
Not Available
Interesting Facts
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
Sources
Formed by Decay Process, Mining
Formed by Decay Process, Mining
Who Discovered
Marguerite Perey
Marguerite Perey
Discovery
In 1939
In 1939
Uses & Benefits
- Francium has no known uses as it has a half life of only 22 minutes.
- Francium has no known uses as it has a half life of only 22 minutes.
Present in Human Body
No
No
Physical State
Solid
Solid
Speed of Sound
Not Available
Not Available
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Pauling Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Pauling Electropositivity
Electrochemical Equivalent
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Electron Configuration
[Rn] 7s1
[Rn] 7s1
Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atomic Volume
Not Available
Not Available
Valence Electron Potential
Lattice Constant
Not Available
Not Available
Lattice C/A Ratio
Not Available
Not Available
Density At Room Temperature
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
NA
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Property
Poor Conductor
Poor Conductor
Specific Heat
Not Available
Not Available
Molar Heat Capacity
Not Available
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Not Available
Standard Molar Entropy
Not Available
Not Available