1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.8 Block
1.9 Element Family
1.10 CAS Number
74407357440279
7429905
54386242
2.4 Space Group Name
2.6 Space Group Number
3 Facts
3.1 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.
3.2 Sources
Formed by Decay Process, Mining
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
3.3 History
3.3.1 Who Discovered
Marguerite Perey
Carl Gustaf Mosander
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
1.7.2 Abundance In Sun
~-9999 %~0.00000001 %
1E-08
0.1
4.4.4 Abundance In Meteorites
5.5.1 Abundance In Earth's Crust
5.9.4 Abundance In Oceans
5.9.10 Abundance In Humans
9 Uses
9.1 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.
9.1.1 Industrial Uses
9.1.2 Medical Uses
9.1.3 Other Uses
9.2 Biological Properties
9.3.1 Toxicity
9.3.3 Present in Human Body
9.3.4 In Blood
0.00 Blood/mg dm-3NA
0
1970
12.1.1 In Bone
13 Physical
13.1 Melting Point
27.00 °C1,356.00 °C
27
3410
13.6 Boiling Point
677.00 °C3,123.00 °C
147
5660
13.7 Appearance
13.7.1 Physical State
13.7.2 Color
13.7.3 Luster
13.8 Hardness
13.8.1 Mohs Hardness
13.8.4 Brinell Hardness
13.10.2 Vickers Hardness
13.12 Speed of Sound
14.3 Optical Properties
14.3.1 Refractive Index
14.3.2 Reflectivity
14.4 Allotropes
14.4.1 α Allotropes
Not Available
Not Available
14.4.2 β Allotropes
Not Available
Not Available
14.4.3 γ Allotropes
Not Available
Not Available
15 Chemical
15.1 Chemical Formula
15.2 Isotopes
15.2.1 Known Isotopes
15.5 Electronegativity
15.5.1 Pauling Electronegativity
16.1.1 Sanderson Electronegativity
17.3.3 Allred Rochow Electronegativity
17.4.1 Mulliken-Jaffe Electronegativity
17.4.3 Allen Electronegativity
18.4 Electropositivity
18.4.1 Pauling Electropositivity
18.6 Ionization Energies
18.6.1 1st Energy Level
380.00 kJ/mol603.40 kJ/mol
375.7
26130
18.7.3 2nd Energy Level
NA1,174.80 kJ/mol
710.2162
28750
18.7.5 3rd Energy Level
NA2,417.00 kJ/mol
1600
34230
18.8.4 4th Energy Level
NA4,203.00 kJ/mol
2780
37066
18.8.5 5th Energy Level
18.8.9 6th Energy Level
18.8.11 7th Energy level
18.8.13 8th Energy Level
18.8.16 9th Energy Level
18.8.17 10th Energy Level
18.9.4 11th Energy Level
18.9.6 12th Energy Level
18.10.2 13th Energy Level
19.2.2 14th Energy Level
19.4.3 15th Energy Level
19.5.2 16th Energy Level
19.6.5 17th Energy Level
19.6.6 18th Energy Level
19.6.11 19th Energy Level
19.6.13 20th Energy Level
19.6.16 21st Energy Level
19.6.18 22nd Energy Level
19.6.21 23rd Energy Level
19.7.2 24th Energy Level
19.7.5 25th Energy Level
19.8.2 26th Energy Level
19.8.5 27th Energy Level
19.8.8 28th Energy Level
19.8.10 29th Energy Level
19.8.14 30th Energy Level
19.9 Electrochemical Equivalent
8.32 g/amp-hr1.98 g/amp-hr
0.16812
8.3209
19.10 Electron Work Function
19.11 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
20 Atomic
20.1 Atomic Number
20.2 Electron Configuration
20.3 Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
20.3.1 Crystal Lattice
20.4 Atom
20.4.1 Number of Protons
20.4.7 Number of Neutrons
20.5.1 Number of Electrons
20.6 Radius of an Atom
20.6.1 Atomic Radius
20.7.2 Covalent Radius
260.00 pm194.00 pm
96
260
20.7.4 Van der Waals Radius
348.00 pm221.00 pm
139
348
20.8 Atomic Weight
223.00 amu158.93 amu
6.94
294
21.2 Atomic Volume
NA19.20 cm3/mol
1.39
71.07
21.6 Adjacent Atomic Numbers
21.6.1 Previous Element
21.6.2 Next Element
21.7 Valence Electron Potential
8.00 (-eV)46.80 (-eV)
8
392.42
21.8 Lattice Constant
NA360.10 pm
228.58
891.25
21.9 Lattice Angles
21.10 Lattice C/A Ratio
22 Mechanical
22.1 Density
22.1.1 Density At Room Temperature
1.87 g/cm38.23 g/cm3
0.534
40.7
22.2.8 Density When Liquid (at m.p.)
22.4 Tensile Strength
22.6 Viscosity
22.9 Vapor Pressure
22.9.1 Vapor Pressure at 1000 K
22.9.4 Vapor Pressure at 2000 K
NA12.50 (Pa)
2.62E-10
774
22.11 Elasticity properties
22.11.1 Shear Modulus
22.13.3 Bulk Modulus
23.1.5 Young's Modulus
23.2 Poisson Ratio
23.4 Other Mechanical Properties
24 Magnetic
24.1 Magnetic Characteristics
24.1.1 Specific Gravity
24.2.3 Magnetic Ordering
Paramagnetic
Paramagnetic
24.2.4 Permeability
24.2.6 Susceptibility
24.5 Electrical Properties
24.5.1 Electrical Property
24.5.2 Resistivity
3.00 nΩ·m1.15 nΩ·m
0.18
961
24.7.1 Electrical Conductivity
0.03 106/cm Ω0.01 106/cm Ω
0.00666
0.63
25.2.1 Electron Affinity
26 Thermal
26.1 Specific Heat
26.5 Molar Heat Capacity
NA28.91 J/mol·K
16.443
62.7
27.2 Thermal Conductivity
15.00 W/m·K11.10 W/m·K
6.3
429
27.6 Critical Temperature
27.7 Thermal Expansion
28.3 Enthalpy
28.3.1 Enthalpy of Vaporization
NA330.90 kJ/mol
7.32
799.1
28.5.4 Enthalpy of Fusion
29.1.2 Enthalpy of Atomization
71.00 kJ/mol314.00 kJ/mol
61.5
837
29.3 Standard Molar Entropy
NA73.20 J/mol.K
9.5
198.1