1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
Lanthanide
Alkaline Earth
1.6 CAS Number
74406007440144
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
- Holmium metal is very soft and malleable.
- Holmium metal is well known for its corrosion resistivity.
- Radium metal is the heaviest metal of Alkaline earth metals column.
- Radium metal is highly radioactive and does not have any stable isotopes.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Mining, Ores of metals
2.3 History
2.3.1 Who Discovered
Marc Delafontaine
Not Available
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
- 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.
- It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
-
It is used in luminous paints.
3.1.1 Industrial Uses
3.1.2 Medical Uses
NA
Pharmaceutical Industry
3.1.3 Other Uses
Alloys, Nuclear Research
NA
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
3.2.3 In Blood
3.2.4 In Bone
4 Physical
4.1 Melting Point
1,461.00 °C700.00 °C
27
3410
4.2 Boiling Point
2,600.00 °C1,737.00 °C
147
5660
4.3 Appearance
4.3.1 Physical State
4.3.2 Color
Silvery White
Silvery White
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
581.00 kJ/mol509.30 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
1,140.00 kJ/mol979.00 kJ/mol
710.2162
28750
5.5.3 3rd Energy Level
2,204.00 kJ/molNA
1600
34230
5.5.4 4th Energy Level
4,100.00 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
5.6 Electrochemical Equivalent
2.02 g/amp-hr4.22 g/amp-hr
0.16812
8.3209
5.7 Electron Work Function
5.8 Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
6.4.2 Number of Neutrons
6.4.3 Number of Electrons
6.5 Radius of an Atom
6.5.1 Atomic Radius
6.5.2 Covalent Radius
192.00 pm221.00 pm
96
260
6.5.3 Van der Waals Radius
216.00 pm283.00 pm
139
348
6.6 Atomic Weight
164.93 amu226.00 amu
6.94
294
6.7 Atomic Volume
18.70 cm3/mol45.20 cm3/mol
1.39
71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
47.90 (-eV)20.10 (-eV)
8
392.42
6.10 Lattice Constant
357.73 pm514.80 pm
228.58
891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
8.79 g/cm35.50 g/cm3
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
7.2 Tensile Strength
7.3 Viscosity
1.3 Vapor Pressure
1.3.1 Vapor Pressure at 1000 K
1.3.2 Vapor Pressure at 2000 K
1.5 Elasticity properties
1.5.1 Shear Modulus
1.10.1 Bulk Modulus
2.4.3 Young's Modulus
2.5 Poisson Ratio
2.6 Other Mechanical Properties
Ductile, Malleable, Sectile
NA
3 Magnetic
3.1 Magnetic Characteristics
3.1.1 Specific Gravity
3.1.3 Magnetic Ordering
3.1.4 Permeability
4.2.4 Susceptibility
4.3 Electrical Properties
4.3.1 Electrical Property
4.3.2 Resistivity
814.00 nΩ·m100.00 nΩ·m
0.18
961
5.1.1 Electrical Conductivity
0.01 106/cm ΩNA
0.00666
0.63
5.2.1 Electron Affinity
6 Thermal
6.1 Specific Heat
0.16 J/(kg K)0.12 J/(kg K)
0.11
3.6
6.4 Molar Heat Capacity
27.15 J/mol·KNA
16.443
62.7
6.5 Thermal Conductivity
16.20 W/m·K18.60 W/m·K
6.3
429
6.6 Critical Temperature
6.8 Thermal Expansion
6.10 Enthalpy
6.10.1 Enthalpy of Vaporization
241.00 kJ/molNA
7.32
799.1
6.11.3 Enthalpy of Fusion
7.2.2 Enthalpy of Atomization
301.00 kJ/mol163.00 kJ/mol
61.5
837
7.4 Standard Molar Entropy
75.30 J/mol.K71.00 J/mol.K
9.5
198.1