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
74407357440600
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
- Holmium metal is very soft and malleable.
- Holmium metal is well known for its corrosion resistivity.
2.2 Sources
Formed by Decay Process, Mining
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Marguerite Perey
Marc Delafontaine
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2.4.2 Abundance In Sun
~-9999 %~-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
- Francium has no known uses as it has a half life of only 22 minutes.
- Holmium metal has an ability to absorb neutrons, so this metal is used in nuclear reactors to keep the chain reactions of elements under control.
-
Alloys of Holmium are used to produce Magnet.
3.1.1 Industrial Uses
3.1.2 Medical Uses
3.1.3 Other Uses
NA
Alloys, Nuclear Research
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
1.1.1 In Blood
0.00 Blood/mg dm-3NA
0
1970
1.2.1 In Bone
2 Physical
2.1 Melting Point
27.00 °C1,461.00 °C
27
3410
2.5 Boiling Point
677.00 °C2,600.00 °C
147
5660
2.8 Appearance
2.8.1 Physical State
2.8.2 Color
2.8.3 Luster
2.9 Hardness
2.9.1 Mohs Hardness
3.4.2 Brinell Hardness
3.4.4 Vickers Hardness
3.5 Speed of Sound
3.6 Optical Properties
3.6.1 Refractive Index
3.6.3 Reflectivity
3.7 Allotropes
3.7.1 α Allotropes
Not Available
Not Available
3.7.2 β Allotropes
Not Available
Not Available
3.7.3 γ Allotropes
Not Available
Not Available
4 Chemical
4.1 Chemical Formula
4.2 Isotopes
4.2.1 Known Isotopes
4.3 Electronegativity
4.3.1 Pauling Electronegativity
5.2.4 Sanderson Electronegativity
5.2.6 Allred Rochow Electronegativity
6.1.1 Mulliken-Jaffe Electronegativity
6.1.2 Allen Electronegativity
6.3 Electropositivity
6.3.1 Pauling Electropositivity
6.4 Ionization Energies
6.4.1 1st Energy Level
380.00 kJ/mol581.00 kJ/mol
375.7
26130
6.6.2 2nd Energy Level
NA1,140.00 kJ/mol
710.2162
28750
6.6.3 3rd Energy Level
NA2,204.00 kJ/mol
1600
34230
6.6.4 4th Energy Level
NA4,100.00 kJ/mol
2780
37066
6.6.6 5th Energy Level
6.6.7 6th Energy Level
6.6.9 7th Energy level
6.7.1 8th Energy Level
6.7.2 9th Energy Level
6.8.2 10th Energy Level
6.8.3 11th Energy Level
6.8.5 12th Energy Level
6.8.6 13th Energy Level
6.9.1 14th Energy Level
7.2.2 15th Energy Level
7.2.3 16th Energy Level
7.2.4 17th Energy Level
7.2.5 18th Energy Level
7.2.6 19th Energy Level
7.2.7 20th Energy Level
7.2.8 21st Energy Level
7.3.2 22nd Energy Level
7.3.3 23rd Energy Level
7.3.5 24th Energy Level
7.3.6 25th Energy Level
7.3.7 26th Energy Level
7.3.8 27th Energy Level
7.3.10 28th Energy Level
7.3.12 29th Energy Level
7.3.13 30th Energy Level
7.4 Electrochemical Equivalent
8.32 g/amp-hr2.02 g/amp-hr
0.16812
8.3209
7.6 Electron Work Function
7.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
8 Atomic
8.1 Atomic Number
8.2 Electron Configuration
8.3 Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
8.3.1 Crystal Lattice
8.4 Atom
8.4.1 Number of Protons
8.4.3 Number of Neutrons
8.4.5 Number of Electrons
8.5 Radius of an Atom
8.5.1 Atomic Radius
8.5.3 Covalent Radius
260.00 pm192.00 pm
96
260
8.5.5 Van der Waals Radius
348.00 pm216.00 pm
139
348
8.6 Atomic Weight
223.00 amu164.93 amu
6.94
294
8.7 Atomic Volume
NA18.70 cm3/mol
1.39
71.07
8.8 Adjacent Atomic Numbers
8.8.1 Previous Element
8.8.2 Next Element
8.9 Valence Electron Potential
8.00 (-eV)47.90 (-eV)
8
392.42
8.10 Lattice Constant
NA357.73 pm
228.58
891.25
8.11 Lattice Angles
8.12 Lattice C/A Ratio
9 Mechanical
9.1 Density
9.1.1 Density At Room Temperature
1.87 g/cm38.79 g/cm3
0.534
40.7
9.1.4 Density When Liquid (at m.p.)
9.2 Tensile Strength
9.3 Viscosity
9.4 Vapor Pressure
9.4.1 Vapor Pressure at 1000 K
9.4.3 Vapor Pressure at 2000 K
9.5 Elasticity properties
9.5.1 Shear Modulus
9.5.3 Bulk Modulus
9.5.6 Young's Modulus
9.6 Poisson Ratio
9.7 Other Mechanical Properties
NA
Ductile, Malleable, Sectile
10 Magnetic
10.1 Magnetic Characteristics
10.1.1 Specific Gravity
10.1.3 Magnetic Ordering
Paramagnetic
Paramagnetic
10.1.4 Permeability
10.1.6 Susceptibility
10.2 Electrical Properties
10.2.1 Electrical Property
10.2.2 Resistivity
3.00 nΩ·m814.00 nΩ·m
0.18
961
10.2.3 Electrical Conductivity
0.03 106/cm Ω0.01 106/cm Ω
0.00666
0.63
10.2.4 Electron Affinity
11 Thermal
11.1 Specific Heat
11.2 Molar Heat Capacity
NA27.15 J/mol·K
16.443
62.7
11.3 Thermal Conductivity
15.00 W/m·K16.20 W/m·K
6.3
429
11.4 Critical Temperature
11.5 Thermal Expansion
11.6 Enthalpy
11.6.1 Enthalpy of Vaporization
NA241.00 kJ/mol
7.32
799.1
11.6.2 Enthalpy of Fusion
11.6.3 Enthalpy of Atomization
71.00 kJ/mol301.00 kJ/mol
61.5
837
11.7 Standard Molar Entropy
NA75.30 J/mol.K
9.5
198.1