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Iridium
Iridium

Francium
Francium



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Iridium vs Francium

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1 Periodic Table
1.1 Symbol
Ir
Fr
1.2 Group Number
91
Gadolinium
0 17
1.3 Period Number
67
Lithium
2 7
1.4 Block
d block
s block
1.5 Element Family
Transition Metal
Alkali
1.6 CAS Number
74398857440735
Aluminium
7429905 54386242
1.7 Space Group Name
Fm_ 3m
Not Available
1.8 Space Group Number
225.00NA
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Formed by Decay Process, Mining
2.3 History
2.3.1 Who Discovered
Smithson Tennant
Marguerite Perey
2.3.2 Discovery
In 1803
In 1939
2.4 Abundance
2.4.1 Abundance In Universe
2 * 10-7 %NA
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~0.0000002 %~-9999 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
0.00 %NA
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
0.00 %NA
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
  • 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.
  • Francium has no known uses as it has a half life of only 22 minutes.
3.1.1 Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
NA
3.2 Biological Properties
3.2.1 Toxicity
Toxic
NA
3.2.2 Present in Human Body
3.2.3 In Blood
NA0.00 Blood/mg dm-3
Plutonium
0 1970
3.2.4 In Bone
NA0.00 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
2,410.00 °C27.00 °C
Tin
27 3410
4.2 Boiling Point
4,527.00 °C677.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
NA
4.3.3 Luster
Metallic
NA
4.4 Hardness
4.4.1 Mohs Hardness
6.50NA
Cesium
0.2 8.5
4.4.2 Brinell Hardness
1,670.00 MPaNA
Cesium
0.14 3490
4.4.3 Vickers Hardness
1,760.00 MPaNA
Palladium
121 3430
4.5 Speed of Sound
4,825.00 m/sNA
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
78.00 %NA
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
Ir
Fr
5.2 Isotopes
5.2.1 Known Isotopes
3433
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
2.200.70
Sodium
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.550.86
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NA0.68
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
1.680.67
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
1.803.30
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
880.00 kJ/mol380.00 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,600.00 kJ/molNA
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
NANA
Osmium
1600 34230
5.5.4 4th Energy Level
NANA
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
1.14 g/amp-hr8.32 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
4.55 eVNA
Cesium
2.14 5.65
5.8 Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
6 Atomic
6.1 Atomic Number
7787
Lithium
3 117
6.2 Electron Configuration
[Xe] 4f14 5d7 6s2
[Rn] 7s1
6.3 Crystal Structure
Face Centered Cubic (FCC)
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
7487
Lithium
3 117
6.4.2 Number of Neutrons
110136
Lithium
4 184
6.4.3 Number of Electrons
7487
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
136.00 pmNA
Beryllium
112 265
6.5.2 Covalent Radius
141.00 pm260.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
202.00 pm348.00 pm
Zinc
139 348
6.6 Atomic Weight
192.22 amu223.00 amu
Lithium
6.94 294
6.7 Atomic Volume
9.53 cm3/molNA
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
140.00 (-eV)8.00 (-eV)
Palladium
8 392.42
6.10 Lattice Constant
383.90 pmNA
Beryllium
228.58 891.25
6.11 Lattice Angles
π/2, π/2, π/2
NA
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
22.56 g/cm31.87 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
19.00 g/cm3NA
Lithium
0.512 20
7.2 Tensile Strength
2,000.00 MPaNA
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
0.00 (Pa)NA
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
210.00 GPaNA
Potassium
1.3 222
7.5.2 Bulk Modulus
320.00 GPaNA
Cesium
1.6 462
7.5.3 Young's Modulus
528.00 GPaNA
Cesium
1.7 528
7.6 Poisson Ratio
0.26NA
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
21.78NA
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
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
Conductor
Poor Conductor
8.2.2 Resistivity
47.10 nΩ·m3.00 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
0.19 106/cm Ω0.03 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
151.00 kJ/molNA
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
0.13 J/(kg K)NA
Americium
0.11 3.6
9.2 Molar Heat Capacity
25.10 J/mol·KNA
Beryllium
16.443 62.7
9.3 Thermal Conductivity
147.00 W/m·K15.00 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
6.40 µm/(m·K)NA
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
799.10 kJ/molNA
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
35.23 kJ/molNA
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
837.00 kJ/mol71.00 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
35.50 J/mol.KNA
Beryllium
9.5 198.1