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
74407357440279
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.
- At times Terbium metal acts same as Calcium.
- Terbium metal closely similar to Lanthanum metal.
2.2 Sources
Formed by Decay Process, Mining
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Marguerite Perey
Carl Gustaf Mosander
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2.4.3 Abundance In Sun
~-9999 %~0.00000001 %
1E-08
0.1
2.4.5 Abundance In Meteorites
2.4.7 Abundance In Earth's Crust
2.4.9 Abundance In Oceans
2.4.11 Abundance In Humans
3 Uses
3.1 Uses & Benefits
- Francium has no known uses as it has a half life of only 22 minutes.
- Terbium salts are used in optical devices like laser devices.
-
Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
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
0.00 Blood/mg dm-3NA
0
1970
3.2.5 In Bone
4 Physical
4.1 Melting Point
27.00 °C1,356.00 °C
27
3410
4.2 Boiling Point
677.00 °C3,123.00 °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
4.4.3 Brinell Hardness
4.4.6 Vickers Hardness
4.5 Speed of Sound
4.6 Optical Properties
4.6.1 Refractive Index
4.6.2 Reflectivity
4.8 Allotropes
4.8.1 α Allotropes
Not Available
Not Available
4.8.2 β Allotropes
Not Available
Not Available
4.8.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
5.2 Isotopes
5.2.1 Known Isotopes
5.4 Electronegativity
5.4.1 Pauling Electronegativity
5.4.2 Sanderson Electronegativity
5.4.3 Allred Rochow Electronegativity
5.4.4 Mulliken-Jaffe Electronegativity
6.1.1 Allen Electronegativity
6.5 Electropositivity
6.5.1 Pauling Electropositivity
6.6 Ionization Energies
6.6.1 1st Energy Level
380.00 kJ/mol603.40 kJ/mol
375.7
26130
6.6.3 2nd Energy Level
NA1,174.80 kJ/mol
710.2162
28750
6.6.4 3rd Energy Level
NA2,417.00 kJ/mol
1600
34230
6.6.6 4th Energy Level
NA4,203.00 kJ/mol
2780
37066
6.7.2 5th Energy Level
6.7.3 6th Energy Level
6.7.5 7th Energy level
6.7.7 8th Energy Level
6.8.1 9th Energy Level
6.9.1 10th Energy Level
6.9.2 11th Energy Level
6.11.1 12th Energy Level
6.12.1 13th Energy Level
6.12.2 14th Energy Level
7.1.2 15th Energy Level
7.1.3 16th Energy Level
7.1.5 17th Energy Level
7.1.6 18th Energy Level
7.2.1 19th Energy Level
7.2.2 20th Energy Level
7.4.2 21st Energy Level
7.4.3 22nd Energy Level
7.4.5 23rd Energy Level
7.4.6 24th Energy Level
7.5.2 25th Energy Level
7.5.3 26th Energy Level
7.5.4 27th Energy Level
7.5.5 28th Energy Level
7.5.7 29th Energy Level
7.5.8 30th Energy Level
7.6 Electrochemical Equivalent
8.32 g/amp-hr1.98 g/amp-hr
0.16812
8.3209
7.7 Electron Work Function
7.9 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
8 Atomic
8.1 Atomic Number
9.2 Electron Configuration
9.3 Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
9.3.1 Crystal Lattice
9.4 Atom
9.4.1 Number of Protons
9.4.4 Number of Neutrons
9.4.6 Number of Electrons
9.6 Radius of an Atom
9.6.1 Atomic Radius
9.6.3 Covalent Radius
260.00 pm194.00 pm
96
260
9.6.4 Van der Waals Radius
348.00 pm221.00 pm
139
348
9.7 Atomic Weight
223.00 amu158.93 amu
6.94
294
9.8 Atomic Volume
NA19.20 cm3/mol
1.39
71.07
10.2 Adjacent Atomic Numbers
10.2.1 Previous Element
10.2.2 Next Element
10.3 Valence Electron Potential
8.00 (-eV)46.80 (-eV)
8
392.42
10.5 Lattice Constant
NA360.10 pm
228.58
891.25
10.7 Lattice Angles
10.8 Lattice C/A Ratio
11 Mechanical
11.1 Density
11.1.1 Density At Room Temperature
1.87 g/cm38.23 g/cm3
0.534
40.7
11.2.1 Density When Liquid (at m.p.)
11.4 Tensile Strength
11.6 Viscosity
11.7 Vapor Pressure
11.7.1 Vapor Pressure at 1000 K
11.7.3 Vapor Pressure at 2000 K
NA12.50 (Pa)
2.62E-10
774
11.8 Elasticity properties
11.8.1 Shear Modulus
11.9.1 Bulk Modulus
11.9.2 Young's Modulus
11.10 Poisson Ratio
11.11 Other Mechanical Properties
12 Magnetic
12.1 Magnetic Characteristics
12.1.1 Specific Gravity
12.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
12.1.3 Permeability
12.1.4 Susceptibility
12.2 Electrical Properties
12.2.1 Electrical Property
12.2.2 Resistivity
3.00 nΩ·m1.15 nΩ·m
0.18
961
12.2.3 Electrical Conductivity
0.03 106/cm Ω0.01 106/cm Ω
0.00666
0.63
12.2.4 Electron Affinity
13 Thermal
13.1 Specific Heat
13.2 Molar Heat Capacity
NA28.91 J/mol·K
16.443
62.7
13.3 Thermal Conductivity
15.00 W/m·K11.10 W/m·K
6.3
429
13.4 Critical Temperature
13.5 Thermal Expansion
13.6 Enthalpy
13.6.1 Enthalpy of Vaporization
NA330.90 kJ/mol
7.32
799.1
13.6.2 Enthalpy of Fusion
13.6.3 Enthalpy of Atomization
71.00 kJ/mol314.00 kJ/mol
61.5
837
13.7 Standard Molar Entropy
NA73.20 J/mol.K
9.5
198.1