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Fermium
Fermium

Iridium
Iridium



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Fermium vs Iridium

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1 Periodic Table
1.1 Symbol
Fm
Ir
1.2 Group Number
NA9
Gadolinium
0 17
1.3 Period Number
76
Lithium
2 7
1.4 Block
f block
d block
1.5 Element Family
Actinide
Transition Metal
1.6 CAS Number
74407247439885
Aluminium
7429905 54386242
1.7 Space Group Name
Not Available
Fm_ 3m
1.8 Space Group Number
NA225.00
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
2.2 Sources
Bombarding Pu-239 with Neutrons
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Lawrence Berkeley National Laboratory
Smithson Tennant
2.3.2 Discovery
In 1952
In 1803
2.4 Abundance
2.4.1 Abundance In Universe
NA2 * 10-7 %
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~0.0000002 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
NA0.00 %
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NA0.00 %
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
NANA
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  • Iridium has an anti corrosion properties and it is used in special alloy with Osmium metal and that alloy is used in pen tips and compass bearings.
3.1.1 Industrial Uses
NA
Automobile Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
NA
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Unknown
Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-3NA
Plutonium
0 1970
3.2.4 In Bone
0.00 p.p.m.NA
Plutonium
0 170000
4 Physical
4.1 Melting Point
1,527.00 °C2,410.00 °C
Francium
27 3410
4.2 Boiling Point
NA4,527.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Unknown
Silvery White
4.3.3 Luster
Not Defined
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NA6.50
Cesium
0.2 8.5
4.4.2 Brinell Hardness
NA1,670.00 MPa
Cesium
0.14 3490
4.4.3 Vickers Hardness
NA1,760.00 MPa
Palladium
121 3430
4.5 Speed of Sound
NA4,825.00 m/s
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
NA78.00 %
Molybdenum
58 97
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
Fm
Ir
5.2 Isotopes
5.2.1 Known Isotopes
1834
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.302.20
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.201.55
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
NA1.68
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.701.80
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
627.00 kJ/mol880.00 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,225.00 kJ/mol1,600.00 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
2,363.00 kJ/molNA
Osmium
1600 34230
5.5.4 4th Energy Level
3,792.00 kJ/molNA
Thorium
2780 37066
5.5.5 5th Energy Level
NANA
Dubnium
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium
14110 134700
5.5.10 10th Energy Level
NANA
Strontium
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum
29196 86450
5.5.15 15th Energy Level
NANA
Manganese
41987 97510
5.5.16 16th Energy Level
NANA
Iron
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt
52737 122200
5.5.18 18th Energy Level
NANA
Nickel
58570 134810
5.5.19 19th Energy Level
NANA
Copper
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum
154500 154500
5.6 Electrochemical Equivalent
3.20 g/amp-hr1.14 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
NA4.55 eV
Cesium
2.14 5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Flammable, Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
10077
Lithium
3 117
6.2 Electron Configuration
[Rn] 5f12 7s2
[Xe] 4f14 5d7 6s2
6.3 Crystal Structure
Not Known
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
10074
Lithium
3 117
6.4.2 Number of Neutrons
157110
Lithium
4 184
6.4.3 Number of Electrons
10074
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
NA136.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
NA141.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
245.00 pm202.00 pm
Zinc
139 348
6.6 Atomic Weight
257.00 amu192.22 amu
Lithium
6.94 294
6.7 Atomic Volume
NA9.53 cm3/mol
Manganese
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
NA140.00 (-eV)
Francium
8 392.42
6.10 Lattice Constant
NA383.90 pm
Beryllium
228.58 891.25
6.11 Lattice Angles
NA
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
NA22.56 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NA19.00 g/cm3
Lithium
0.512 20
7.2 Tensile Strength
NA2,000.00 MPa
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NA0.00 (Pa)
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NA210.00 GPa
Potassium
1.3 222
7.5.2 Bulk Modulus
NA320.00 GPa
Cesium
1.6 462
7.5.3 Young's Modulus
NA528.00 GPa
Cesium
1.7 528
7.6 Poisson Ratio
NA0.26
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
NA21.78
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Unknown
Paramagnetic
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Unknown
Conductor
8.2.2 Resistivity
NA47.10 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
NA0.19 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
NA151.00 kJ/mol
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
NA0.13 J/(kg K)
Americium
0.11 3.6
9.2 Molar Heat Capacity
NA25.10 J/mol·K
Beryllium
16.443 62.7
9.3 Thermal Conductivity
NA147.00 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
NA6.40 µm/(m·K)
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
NA799.10 kJ/mol
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
NA35.23 kJ/mol
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
NA837.00 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
NA35.50 J/mol.K
Beryllium
9.5 198.1