1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
1.6 CAS Number
74405317440735
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
Not Available
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Formed by Decay Process, Mining
2.3 History
2.3.1 Who Discovered
Eugène-Anatole Demarçay
Marguerite Perey
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2.4.2 Abundance In Sun
~0.00000005 %~-9999 %
1E-08
0.1
2.4.3 Abundance In Meteorites
2.4.4 Abundance In Earth's Crust
2.4.5 Abundance In Oceans
2.4.6 Abundance In Humans
3 Uses
3.1 Uses & Benefits
- Europium metals main uses is in the printing of euro banknotes. These notes glow red under UV light.
-
It is used in low energy light bulbs.
- Francium has no known uses as it has a half life of only 22 minutes.
3.1.1 Industrial Uses
3.1.2 Medical Uses
3.1.3 Other Uses
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
3.2.3 In Blood
NA0.00 Blood/mg dm-3
0
1970
3.2.4 In Bone
4 Physical
4.1 Melting Point
822.00 °C27.00 °C
27
3410
4.2 Boiling Point
1,597.00 °C677.00 °C
147
5660
4.3 Appearance
4.3.1 Physical State
4.3.2 Color
4.3.3 Luster
4.4 Hardness
4.4.1 Mohs Hardness
4.4.2 Brinell Hardness
4.4.3 Vickers Hardness
4.5 Speed of Sound
4.6 Optical Properties
4.6.1 Refractive Index
4.6.2 Reflectivity
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
5.2 Isotopes
5.2.1 Known Isotopes
5.3 Electronegativity
5.3.1 Pauling Electronegativity
5.3.2 Sanderson Electronegativity
5.3.3 Allred Rochow Electronegativity
5.3.4 Mulliken-Jaffe Electronegativity
5.3.5 Allen Electronegativity
5.4 Electropositivity
5.4.1 Pauling Electropositivity
5.5 Ionization Energies
5.5.1 1st Energy Level
547.10 kJ/mol380.00 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
1,085.00 kJ/molNA
710.2162
28750
5.5.3 3rd Energy Level
2,404.00 kJ/molNA
1600
34230
5.5.4 4th Energy Level
4,120.00 kJ/molNA
2780
37066
5.5.5 5th Energy Level
5.5.6 6th Energy Level
5.5.7 7th Energy level
5.5.8 8th Energy Level
5.5.9 9th Energy Level
5.5.10 10th Energy Level
5.5.11 11th Energy Level
5.5.12 12th Energy Level
5.5.13 13th Energy Level
5.5.14 14th Energy Level
5.5.15 15th Energy Level
5.5.16 16th Energy Level
5.5.17 17th Energy Level
5.5.18 18th Energy Level
5.5.19 19th Energy Level
5.5.20 20th Energy Level
5.5.21 21st Energy Level
5.5.22 22nd Energy Level
5.5.23 23rd Energy Level
5.5.24 24th Energy Level
5.5.25 25th Energy Level
5.5.26 26th Energy Level
5.5.27 27th Energy Level
5.5.28 28th Energy Level
5.5.29 29th Energy Level
5.5.30 30th Energy Level
1.3 Electrochemical Equivalent
1.89 g/amp-hr8.32 g/amp-hr
0.16812
8.3209
1.5 Electron Work Function
1.6 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
2 Atomic
2.1 Atomic Number
2.5 Electron Configuration
2.6 Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
2.6.1 Crystal Lattice
2.7 Atom
2.7.1 Number of Protons
2.9.1 Number of Neutrons
2.9.2 Number of Electrons
2.10 Radius of an Atom
2.10.1 Atomic Radius
2.10.2 Covalent Radius
198.00 pm260.00 pm
96
260
2.10.3 Van der Waals Radius
233.00 pm348.00 pm
139
348
2.11 Atomic Weight
151.96 amu223.00 amu
6.94
294
2.12 Atomic Volume
28.90 cm3/molNA
1.39
71.07
2.13 Adjacent Atomic Numbers
2.13.1 Previous Element
2.13.2 Next Element
2.14 Valence Electron Potential
45.60 (-eV)8.00 (-eV)
8
392.42
2.15 Lattice Constant
458.10 pmNA
228.58
891.25
2.16 Lattice Angles
2.17 Lattice C/A Ratio
3 Mechanical
3.1 Density
3.1.1 Density At Room Temperature
5.26 g/cm31.87 g/cm3
0.534
40.7
3.1.2 Density When Liquid (at m.p.)
3.2 Tensile Strength
3.3 Viscosity
3.4 Vapor Pressure
3.4.1 Vapor Pressure at 1000 K
19.40 (Pa)NA
2.47E-11
121
3.4.2 Vapor Pressure at 2000 K
3.5 Elasticity properties
3.5.1 Shear Modulus
3.5.2 Bulk Modulus
3.5.3 Young's Modulus
3.6 Poisson Ratio
3.7 Other Mechanical Properties
4 Magnetic
4.1 Magnetic Characteristics
4.1.1 Specific Gravity
4.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
4.1.3 Permeability
4.1.4 Susceptibility
4.2 Electrical Properties
4.2.1 Electrical Property
4.2.2 Resistivity
0.90 nΩ·m3.00 nΩ·m
0.18
961
4.2.3 Electrical Conductivity
0.01 106/cm Ω0.03 106/cm Ω
0.00666
0.63
4.2.4 Electron Affinity
5 Thermal
5.1 Specific Heat
5.2 Molar Heat Capacity
27.66 J/mol·KNA
16.443
62.7
5.3 Thermal Conductivity
13.90 W/m·K15.00 W/m·K
6.3
429
5.4 Critical Temperature
5.5 Thermal Expansion
5.6 Enthalpy
5.6.1 Enthalpy of Vaporization
143.50 kJ/molNA
7.32
799.1
5.6.2 Enthalpy of Fusion
5.6.3 Enthalpy of Atomization
180.00 kJ/mol71.00 kJ/mol
61.5
837
5.7 Standard Molar Entropy
77.80 J/mol.KNA
9.5
198.1