Element Family
Alkali
Transition Metal
Space Group Name
Not Available
R_ 3m
Space Group Number
Not Available
Interesting Facts
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
- At room temperature mercury is found in a liquid state.
- A coin of pound or rupees floats in mercury.
- Because of its low melting point and boiling point it is used in thermometers.
Sources
Formed by Decay Process, Mining
Mining, Ores of Minerals
Who Discovered
Marguerite Perey
Ancient Chinese and Indians
Discovery
In 1939
Before 2000 BCE
Abundance In Earth's Crust
Not Available
Uses & Benefits
- Francium has no known uses as it has a half life of only 22 minutes.
- It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
- It is manly used as a catalysts in chemical industry.
Industrial Uses
NA
Electrical Industry, Electronic Industry
Medical Uses
NA
Dentistry
Other Uses
NA
Alloys, Mirror Manufacturing, Pharmaceutical Industry
Present in Human Body
No
Yes
Melting Point
Not Available
Physical State
Solid
Liquid
Speed of Sound
Not Available
Refractive Index
Not Available
Reflectivity
Not Available
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Pauling Electronegativity
Sanderson Electronegativity
Not Available
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Pauling Electropositivity
2nd Energy Level
Not Available
3rd Energy Level
Not Available
Electrochemical Equivalent
Electron Work Function
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Flammability, Ionization, Solubility
Electron Configuration
[Rn] 7s1
[Xe] 4f14 5d10 6s2
Crystal Structure
Body Centered Cubic (BCC)
Rhombohedral (RHO)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
RHO-Crystal-Structure-of-Mercury.jpg#100
Atomic Radius
Not Available
Atomic Volume
Not Available
Valence Electron Potential
Lattice Constant
Not Available
Lattice C/A Ratio
Not Available
Not Available
Density At Room Temperature
Tensile Strength
Not Available
Not Available
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
NA
Specific Gravity
Not Available
Magnetic Ordering
Paramagnetic
Diamagnetic
Electrical Property
Poor Conductor
Conductor
Electron Affinity
Not Available
Specific Heat
Not Available
Molar Heat Capacity
Not Available
Critical Temperature
Not Available
Thermal Expansion
Not Available
Enthalpy of Vaporization
Not Available
Enthalpy of Fusion
Not Available
Standard Molar Entropy
Not Available