1 Periodic Table
1.1 Symbol
1.2 Group Number
2.2 Period Number
2.3 Block
2.4 Element Family
Post-Transition
Lanthanide
2.5 CAS Number
74400867440199
7429905
54386242
2.7 Space Group Name
2.8 Space Group Number
3 Facts
3.1 Interesting Facts
- Polonium was the first radioactive element to be discovered.
- Polonium element and its compounds are highly radioactive.
- Its alloy with Beryllium provides source of neutrons.
- Samarium metals helps stimulating body metabolism.
- Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
3.2 Sources
Mining, Ores of metals
Found in Minerals, Mining, Ores of Minerals
3.3 History
3.3.1 Who Discovered
Pierre Curie and Marie Curie
Lecoq de Boisbaudran
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
4.1.1 Abundance In Sun
~-9999 %~0.0000001 %
1E-08
0.1
4.3.1 Abundance In Meteorites
4.4.1 Abundance In Earth's Crust
4.5.1 Abundance In Oceans
4.6.2 Abundance In Humans
5 Uses
5.1 Uses & Benefits
- Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
- A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
- Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
- Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
5.1.1 Industrial Uses
Aerospace Industry, Ammunition Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
5.1.2 Medical Uses
5.1.3 Other Uses
Alloys
Alloys, In Nuclear Reactors
5.2 Biological Properties
5.2.1 Toxicity
Highly Toxic
Slightly Toxic
5.2.2 Present in Human Body
5.2.3 In Blood
0.00 Blood/mg dm-30.01 Blood/mg dm-3
0
1970
5.3.1 In Bone
6 Physical
6.1 Melting Point
254.00 °C1,072.00 °C
27
3410
6.2 Boiling Point
962.00 °C1,900.00 °C
147
5660
6.3 Appearance
6.3.1 Physical State
6.3.2 Color
6.3.3 Luster
6.4 Hardness
6.4.1 Mohs Hardness
6.4.2 Brinell Hardness
6.4.3 Vickers Hardness
6.5 Speed of Sound
6.6 Optical Properties
6.6.1 Refractive Index
6.6.2 Reflectivity
6.7 Allotropes
6.7.1 α Allotropes
6.7.2 β Allotropes
6.7.3 γ Allotropes
Not Available
Not Available
7 Chemical
7.1 Chemical Formula
7.2 Isotopes
7.2.1 Known Isotopes
7.3 Electronegativity
7.3.1 Pauling Electronegativity
7.3.2 Sanderson Electronegativity
7.3.3 Allred Rochow Electronegativity
7.3.4 Mulliken-Jaffe Electronegativity
7.3.5 Allen Electronegativity
7.4 Electropositivity
7.4.1 Pauling Electropositivity
7.5 Ionization Energies
7.5.1 1st Energy Level
812.10 kJ/mol544.50 kJ/mol
375.7
26130
7.5.2 2nd Energy Level
NA1,070.00 kJ/mol
710.2162
28750
7.5.3 3rd Energy Level
NA2,260.00 kJ/mol
1600
34230
7.5.4 4th Energy Level
NA3,990.00 kJ/mol
2780
37066
7.5.5 5th Energy Level
7.5.6 6th Energy Level
7.5.7 7th Energy level
7.5.8 8th Energy Level
7.5.9 9th Energy Level
7.5.10 10th Energy Level
7.5.11 11th Energy Level
7.5.12 12th Energy Level
7.5.13 13th Energy Level
7.5.14 14th Energy Level
7.5.15 15th Energy Level
7.5.16 16th Energy Level
7.5.17 17th Energy Level
7.5.18 18th Energy Level
7.5.19 19th Energy Level
7.5.20 20th Energy Level
7.5.21 21st Energy Level
7.5.22 22nd Energy Level
7.5.23 23rd Energy Level
7.5.24 24th Energy Level
7.5.25 25th Energy Level
7.5.26 26th Energy Level
7.5.27 27th Energy Level
7.5.28 28th Energy Level
7.5.29 29th Energy Level
7.5.30 30th Energy Level
7.6 Electrochemical Equivalent
3.90 g/amp-hr1.87 g/amp-hr
0.16812
8.3209
7.7 Electron Work Function
7.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes
8 Atomic
8.1 Atomic Number
8.2 Electron Configuration
[Xe] 4f14 5d10 6s2 6p4
[Xe] 4f6 6s2
8.3 Crystal Structure
Monoclinic (MON)
Rhombohedral (RHO)
8.3.1 Crystal Lattice
8.4 Atom
8.4.1 Number of Protons
8.4.2 Number of Neutrons
8.4.3 Number of Electrons
8.5 Radius of an Atom
8.5.1 Atomic Radius
168.00 pm180.00 pm
112
265
8.5.2 Covalent Radius
140.00 pm198.00 pm
96
260
8.5.3 Van der Waals Radius
197.00 pm229.00 pm
139
348
8.6 Atomic Weight
209.00 amu150.36 amu
6.94
294
8.7 Atomic Volume
22.23 cm3/mol19.95 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
8.10 Lattice Constant
335.90 pm362.10 pm
228.58
891.25
8.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
8.12 Lattice C/A Ratio
9 Mechanical
9.1 Density
9.1.1 Density At Room Temperature
9.20 g/cm37.52 g/cm3
0.534
40.7
9.1.2 Density When Liquid (at m.p.)
9.40 g/cm37.16 g/cm3
0.512
20
9.2 Tensile Strength
9.3 Viscosity
9.4 Vapor Pressure
9.4.1 Vapor Pressure at 1000 K
9.4.2 Vapor Pressure at 2000 K
9.5 Elasticity properties
9.5.1 Shear Modulus
9.5.2 Bulk Modulus
9.5.3 Young's Modulus
9.6 Poisson Ratio
9.7 Other Mechanical Properties
10 Magnetic
10.1 Magnetic Characteristics
10.1.1 Specific Gravity
10.1.2 Magnetic Ordering
10.1.3 Permeability
10.1.4 Susceptibility
10.2 Electrical Properties
10.2.1 Electrical Property
10.2.2 Resistivity
0.40 nΩ·m0.94 nΩ·m
0.18
961
10.2.3 Electrical Conductivity
0.02 106/cm Ω0.01 106/cm Ω
0.00666
0.63
10.2.4 Electron Affinity
183.30 kJ/mol50.00 kJ/mol
0
222.8
11 Thermal
11.1 Specific Heat
0.12 J/(kg K)0.20 J/(kg K)
0.11
3.6
11.2 Molar Heat Capacity
26.40 J/mol·K29.54 J/mol·K
16.443
62.7
11.3 Thermal Conductivity
20.00 W/m·K13.30 W/m·K
6.3
429
11.4 Critical Temperature
11.5 Thermal Expansion
23.50 µm/(m·K)12.70 µm/(m·K)
4.5
97
11.6 Enthalpy
11.6.1 Enthalpy of Vaporization
60.30 kJ/mol166.40 kJ/mol
7.32
799.1
11.6.2 Enthalpy of Fusion
13.00 kJ/mol8.62 kJ/mol
2.1
35.23
11.6.3 Enthalpy of Atomization
134.00 kJ/mol209.00 kJ/mol
61.5
837
11.7 Standard Molar Entropy
NA69.60 J/mol.K
9.5
198.1