Symbol
Fm
  
Rh
  
Group Number
Not Available
  
Period Number
7
  
5
  
Block
f block
  
d block
  
Element Family
Actinide
  
Transition Metal
  
Space Group Name
Not Available
  
Fm_ 3m
  
Space Group Number
Not Available
  
Interesting Facts
- Fermium metal is highly radioactive in nature.
- Fermium is synthetically produced metal.
  
- Rhodium is the rarest element out of all non-radioactive metals on the earth .
- Rhodium is one of the most durable and hard metal, which also have high reflectance.
  
Sources
Bombarding Pu-239 with Neutrons
  
Earth's crust, Found As a By-product, Found in Minerals, Mining
  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory
  
William Hyde Wollaston
  
Discovery
In 1952
  
In 1804
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.0000002 %
  
25
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Uses & Benefits
- Currently known uses of Fermium metal are limited to research purpose only.
  
- Rhodium metal is mainly used in catalytic converters for cars as it reduces nitrogen oxides in exhaust gases.
- It is used as an industrial catalyst for nitric acid, acetic acid, hydrogenation reaction, etc.
  
Industrial Uses
NA
  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
NA
  
Other Uses
NA
  
Alloys
  
Biological Properties
  
  
Toxicity
Unknown
  
NA
  
Present in Human Body
No
  
No
  
In Blood
0.00 Blood/mg dm-3
  
37
Not Available
  
In Bone
0.00 p.p.m.
  
36
Not Available
  
Melting Point
1,527.00 °C
  
26
1,966.00 °C
  
12
Boiling Point
Not Available
  
3,727.00 °C
  
17
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Silvery White
  
Luster
Not Defined
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
1,100.00 MPa
  
9
Speed of Sound
Not Available
  
4,700.00 m/s
  
15
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Fm
  
Rh
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
627.00 kJ/mol
  
99+
719.70 kJ/mol
  
29
2nd Energy Level
1,225.00 kJ/mol
  
99+
1,740.00 kJ/mol
  
26
3rd Energy Level
2,363.00 kJ/mol
  
99+
2,997.00 kJ/mol
  
27
4th Energy Level
3,792.00 kJ/mol
  
99+
Not Available
  
Electrochemical Equivalent
3.20 g/amp-hr
  
13
1.28 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Anti Corrosion, Ionization, Radioactive Isotopes
  
Electron Configuration
[Rn] 5f12 7s2
  
[Kr] 4d8 5s1
  
Crystal Structure
Not Known
  
Face Centered Cubic (FCC)
  
Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100
  
FCC-Crystal-Structure-of-Rhodium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Radius
Not Available
  
Covalent Radius
Not Available
  
Atomic Weight
102.91 amu
  
99+
Atomic Volume
Not Available
  
8.30 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
64.00 (-eV)
  
22
Lattice Constant
Not Available
  
Lattice Angles
NA
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
Not Available
  
12.41 g/cm
3
  
28
Density When Liquid (at m.p.)
Not Available
  
10.70 g/cm3
  
14
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
NA
  
Malleable
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
43.30 nΩ·m
  
99+
Electrical Conductivity
Not Available
  
0.21 10
6/cm Ω
  
8
Electron Affinity
Not Available
  
109.70 kJ/mol
  
7
Specific Heat
Not Available
  
0.24 J/(kg K)
  
22
Molar Heat Capacity
Not Available
  
24.98 J/mol·K
  
99+
Thermal Conductivity
Not Available
  
150.00 W/m·K
  
9
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
8.20 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
495.40 kJ/mol
  
12
Enthalpy of Fusion
Not Available
  
21.76 kJ/mol
  
10
Enthalpy of Atomization
Not Available
  
556.50 kJ/mol
  
12
Standard Molar Entropy
Not Available
  
31.50 J/mol.K
  
99+