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Mendelevium
Mendelevium

Niobium
Niobium



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Mendelevium
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Mendelevium vs Niobium

1 Periodic Table
1.1 Symbol
Md
Nb
1.2 Group Number
NA5
Gadolinium
0 17
1.4 Period Number
75
Lithium
2 7
1.8 Block
f block
d block
1.9 Element Family
Actinide
Transition Metal
1.10 CAS Number
74401117440031
Aluminium
7429905 54386242
1.13 Space Group Name
Not Available
Im_ 3m
1.14 Space Group Number
NA229.00
Plutonium
11 229
3 Facts
3.1 Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  • Niobium metal was used to get called Columbium in past.
  • Niobium metal found freely in nature (abundance).
3.2 Sources
Bombarding Einsteinium with Helium Ions
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals
3.3 History
3.3.1 Who Discovered
Lawrence Berkeley National Laboratory
Charles Hatchett
3.3.2 Discovery
In 1955
In 1801
3.4 Abundance
3.4.1 Abundance In Universe
NA2 * 10-7 %
Thallium
5E-09 0.11
3.4.4 Abundance In Sun
~-9999 %~0.0000004 %
Beryllium
1E-08 0.1
3.4.7 Abundance In Meteorites
NA0.00 %
Gold
1.7E-07 22
3.4.10 Abundance In Earth's Crust
NA0.00 %
Radium
9.9E-12 8.1
3.4.14 Abundance In Oceans
NA0.00 %
Protactinium
2E-23 1.1
3.4.17 Abundance In Humans
NANA
Radium
1E-13 1.4
5 Uses
5.1 Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  • Niobium alloys are used in jet engines and rockets and spacecraft, beams and girders for buildings and oil and gas pipelines.
  • It is used superconducting magnets in particles accelerators, NMR and MRI equipment.
5.1.1 Industrial Uses
NA
Aerospace Industry, Ammunition Industry, Electrical Industry, Electronic Industry
5.1.2 Medical Uses
NA
NA
5.1.3 Other Uses
NA
Alloys
5.2 Biological Properties
5.2.1 Toxicity
Unknown
Low Toxic
5.2.2 Present in Human Body
5.2.3 In Blood
0.00 Blood/mg dm-30.01 Blood/mg dm-3
Plutonium
0 1970
5.2.6 In Bone
0.00 p.p.m.0.07 p.p.m.
Plutonium
0 170000
7 Physical
7.1 Melting Point
827.00 °C2,468.00 °C
Francium
27 3410
7.3 Boiling Point
NA2,468.00 °C
Flerovium
147 5660
7.6 Appearance
7.6.1 Physical State
Solid
Solid
7.6.2 Color
Unknown
Gray
7.6.3 Luster
Metallic
Metallic
7.7 Hardness
7.7.1 Mohs Hardness
NA6.00
Cesium
0.2 8.5
7.8.2 Brinell Hardness
NA735.00 MPa
Cesium
0.14 3490
7.9.2 Vickers Hardness
NA870.00 MPa
Palladium
121 3430
8.3 Speed of Sound
NA3,480.00 m/s
Thallium
818 16200
8.8 Optical Properties
8.8.1 Refractive Index
NANA
Mercury
1.000933 1.7229
8.8.3 Reflectivity
NANA
Molybdenum
58 97
9.3 Allotropes
9.3.1 α Allotropes
Not Available
Not Available
9.3.2 β Allotropes
Not Available
Not Available
9.3.3 γ Allotropes
Not Available
Not Available
10 Chemical
10.1 Chemical Formula
Md
Nb
10.2 Isotopes
10.2.1 Known Isotopes
1617
Tennessine
0 38
10.4 Electronegativity
10.4.1 Pauling Electronegativity
1.301.60
Francium
0.7 2.54
10.5.3 Sanderson Electronegativity
NA1.42
Cesium
0.22 2.56
10.5.7 Allred Rochow Electronegativity
1.201.23
Cesium
0.86 1.82
10.6.1 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
10.6.3 Allen Electronegativity
NA1.41
Cesium
0.659 2.7
10.9 Electropositivity
10.9.1 Pauling Electropositivity
2.702.40
Gold
1.46 3.3
10.13 Ionization Energies
10.13.1 1st Energy Level
635.00 kJ/mol652.10 kJ/mol
Cesium
375.7 26130
10.14.1 2nd Energy Level
1,235.00 kJ/mol1,380.00 kJ/mol
Ruthenium
710.2162 28750
10.16.1 3rd Energy Level
2,470.00 kJ/mol2,416.00 kJ/mol
Osmium
1600 34230
11.1.3 4th Energy Level
3,840.00 kJ/mol3,700.00 kJ/mol
Thorium
2780 37066
11.1.5 5th Energy Level
NA4,877.00 kJ/mol
Dubnium
4305.2 97510
11.2.1 6th Energy Level
NA9,847.00 kJ/mol
Seaborgium
5715.8 105800
11.3.1 7th Energy level
NA12,100.00 kJ/mol
Bohrium
7226.8 114300
11.4.3 8th Energy Level
NANA
Hassium
8857.4 125300
11.4.6 9th Energy Level
NANA
Yttrium
14110 134700
11.5.3 10th Energy Level
NANA
Strontium
17100 144300
11.5.5 11th Energy Level
NANA
Yttrium
19900 169988
11.5.8 12th Energy Level
NANA
Molybdenum
22219 189368
11.6.1 13th Energy Level
NANA
Molybdenum
26930 76015
12.1.2 14th Energy Level
NANA
Molybdenum
29196 86450
12.1.6 15th Energy Level
NANA
Manganese
41987 97510
12.1.9 16th Energy Level
NANA
Iron
47206 109480
12.2.3 17th Energy Level
NANA
Cobalt
52737 122200
12.2.5 18th Energy Level
NANA
Nickel
58570 134810
12.2.8 19th Energy Level
NANA
Copper
64702 148700
12.2.11 20th Energy Level
NANA
Molybdenum
80400 171200
12.2.13 21st Energy Level
NANA
Molybdenum
87000 179100
13.1.1 22nd Energy Level
NANA
Molybdenum
93400 184900
13.1.3 23rd Energy Level
NANA
Molybdenum
98420 198800
13.2.2 24th Energy Level
NANA
Molybdenum
104400 195200
13.3.1 25th Energy Level
NANA
Molybdenum
121900 121900
13.3.3 26th Energy Level
NANA
Molybdenum
127700 127700
13.4.2 27th Energy Level
NANA
Molybdenum
133800 133800
13.4.4 28th Energy Level
NANA
Molybdenum
139800 139800
13.5.2 29th Energy Level
NANA
Molybdenum
148100 148100
13.5.3 30th Energy Level
NANA
Molybdenum
154500 154500
13.7 Electrochemical Equivalent
3.21 g/amp-hr0.69 g/amp-hr
Beryllium
0.16812 8.3209
13.9 Electron Work Function
NA4.30 eV
Cesium
2.14 5.65
13.11 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
14 Atomic
14.1 Atomic Number
10141
Lithium
3 117
15.2 Electron Configuration
[Rn] 5f13 7s2
[Kr] 4d4 5s1
15.3 Crystal Structure
Not Known
Body Centered Cubic (BCC)
15.3.1 Crystal Lattice
15.4 Atom
15.4.1 Number of Protons
10141
Lithium
3 117
15.7.2 Number of Neutrons
15752
Lithium
4 184
15.7.4 Number of Electrons
10141
Lithium
3 117
15.8 Radius of an Atom
15.8.1 Atomic Radius
NA146.00 pm
Beryllium
112 265
15.9.2 Covalent Radius
NA164.00 pm
Beryllium
96 260
15.9.4 Van der Waals Radius
246.00 pm200.00 pm
Zinc
139 348
15.10 Atomic Weight
258.00 amu92.91 amu
Lithium
6.94 294
15.12 Atomic Volume
NA10.87 cm3/mol
Manganese
1.39 71.07
15.14 Adjacent Atomic Numbers
15.14.1 Previous Element
15.14.2 Next Element
15.15 Valence Electron Potential
NA104.00 (-eV)
Francium
8 392.42
15.18 Lattice Constant
NA330.04 pm
Beryllium
228.58 891.25
15.20 Lattice Angles
NA
π/2, π/2, π/2
15.21 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
16 Mechanical
16.1 Density
16.1.1 Density At Room Temperature
NA8.57 g/cm3
Lithium
0.534 40.7
17.1.2 Density When Liquid (at m.p.)
NANA
Lithium
0.512 20
17.2 Tensile Strength
NA330.00 MPa
Indium
2.5 11000
17.4 Viscosity
NANA
Mercury
0.001526 0.001526
17.6 Vapor Pressure
17.6.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
17.7.2 Vapor Pressure at 2000 K
NA0.00 (Pa)
Tungsten
2.62E-10 774
17.8 Elasticity properties
17.8.1 Shear Modulus
NA38.00 GPa
Potassium
1.3 222
17.9.2 Bulk Modulus
NA170.00 GPa
Cesium
1.6 462
17.9.4 Young's Modulus
NA105.00 GPa
Cesium
1.7 528
17.10 Poisson Ratio
NA0.40
Beryllium
0.032 0.47
17.11 Other Mechanical Properties
Unknown
Ductile, Malleable
18 Magnetic
18.1 Magnetic Characteristics
18.1.1 Specific Gravity
NA8.57
Lithium
0.53 4500
18.2.1 Magnetic Ordering
Unknown
Paramagnetic
18.2.2 Permeability
NANA
Bismuth
1.25643E-06 0.0063
18.2.3 Susceptibility
NANA
Bismuth
-0.000166 200000
19.2 Electrical Properties
19.2.1 Electrical Property
Unknown
Conductor
19.2.2 Resistivity
NA152.00 nΩ·m
Thallium
0.18 961
19.2.5 Electrical Conductivity
NA0.07 106/cm Ω
Plutonium
0.00666 0.63
19.2.7 Electron Affinity
NA86.10 kJ/mol
Mercury
0 222.8
20 Thermal
20.1 Specific Heat
NA0.26 J/(kg K)
Americium
0.11 3.6
20.2 Molar Heat Capacity
NA24.60 J/mol·K
Beryllium
16.443 62.7
20.3 Thermal Conductivity
NA53.70 W/m·K
Neptunium
6.3 429
21.2 Critical Temperature
NANA
Ytterbium
26.3 3223
21.5 Thermal Expansion
NA7.30 µm/(m·K)
Tungsten
4.5 97
1.3 Enthalpy
1.3.1 Enthalpy of Vaporization
NA696.60 kJ/mol
Zinc
7.32 799.1
1.5.1 Enthalpy of Fusion
NA27.20 kJ/mol
Cesium
2.1 35.23
1.6.2 Enthalpy of Atomization
NA745.00 kJ/mol
Mercury
61.5 837
1.10 Standard Molar Entropy
NA36.40 J/mol.K
Beryllium
9.5 198.1