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Mendelevium vs Tantalum

Mendelevium
Tantalum
Tantalum vs Mendelevium


Periodic Table
Symbol
Md  
Ta  
Group Number
3  
15
5  
13
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7440257  
99+
Space Group Name
-  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
Sources
Bombarding Einsteinium with Helium Ions  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Anders Gustaf Ekeberg  
Discovery
In 1955  
In 1802  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
32
Abundance In Sun
-  
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
37
Abundance In Oceans
-  
0.00 %  
31
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
  • Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.03 p.p.m.  
33
Physical
Melting Point
827.00 °C  
99+
2,996.00 °C  
4
Boiling Point
0.00 °C  
99+
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Gray Blue  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
-  
6.50  
5
Brinell Hardness
350.00 MPa  
36
440.00 MPa  
33
Vickers Hardness
0.00 MPa  
99+
870.00 MPa  
19
Speed of Sound
2,680.00 m/s  
99+
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
1.30  
99+
2.15  
10
Reflectivity
66.00 %  
17
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
Ta  
Isotopes
  
  
Known Isotopes
16  
23
31  
8
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.50  
28
Sanderson Electronegativity
1.30  
25
1.50  
18
Allred Rochow Electronegativity
1.20  
28
1.33  
23
Mulliken-Jaffe Electronegativity
1.30  
33
1.50  
26
Allen Electronegativity
1.30  
40
1.34  
38
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.50  
27
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
761.00 kJ/mol  
18
2nd Energy Level
1,235.00 kJ/mol  
99+
1,500.00 kJ/mol  
99+
3rd Energy Level
2,470.00 kJ/mol  
99+
761.00 kJ/mol  
99+
4th Energy Level
3,840.00 kJ/mol  
99+
7,610.00 kJ/mol  
9
5th Energy Level
6,350.00 kJ/mol  
36
7,610.00 kJ/mol  
19
6th Energy Level
6,350.00 kJ/mol  
99+
7,610.00 kJ/mol  
36
7th Energy level
6,350.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
8th Energy Level
6,350.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
9th Energy Level
6,350.00 kJ/mol  
99+
7,610.00 kJ/mol  
26
10th Energy Level
6,350.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
11th Energy Level
6,400.00 kJ/mol  
99+
7,610.00 kJ/mol  
29
12th Energy Level
60,100.00 kJ/mol  
16
7,610.00 kJ/mol  
99+
13th Energy Level
6,350.00 kJ/mol  
37
7,610.00 kJ/mol  
22
14th Energy Level
1,150.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
15th Energy Level
63,500.00 kJ/mol  
37
76,100.00 kJ/mol  
19
16th Energy Level
635.00 kJ/mol  
99+
76,100.00 kJ/mol  
14
17th Energy Level
1,107.00 kJ/mol  
21
761.00 kJ/mol  
35
18th Energy Level
6,350.00 kJ/mol  
39
7,610.00 kJ/mol  
25
19th Energy Level
635.00 kJ/mol  
99+
761.00 kJ/mol  
32
20th Energy Level
635.00 kJ/mol  
40
761.00 kJ/mol  
26
21st Energy Level
6,350.00 kJ/mol  
13
761.00 kJ/mol  
99+
22nd Energy Level
635.00 kJ/mol  
34
761.00 kJ/mol  
20
23rd Energy Level
6,350.00 kJ/mol  
13
761.00 kJ/mol  
99+
24th Energy Level
635.00 kJ/mol  
36
761.00 kJ/mol  
16
25th Energy Level
635.00 kJ/mol  
38
761.00 kJ/mol  
16
26th Energy Level
635.00 kJ/mol  
37
761.00 kJ/mol  
16
27th Energy Level
635.00 kJ/mol  
39
761.00 kJ/mol  
15
28th Energy Level
635.00 kJ/mol  
99+
761.00 kJ/mol  
21
29th Energy Level
635.00 kJ/mol  
99+
761.00 kJ/mol  
22
30th Energy Level
635.00 kJ/mol  
40
761.00 kJ/mol  
16
Electrochemical Equivalent
3.21 g/amp-hr  
13
1.35 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
101  
17
73  
99+
Electron Configuration
[Rn] 5f13 7s2  
[Xe] 4f14 5d3 6s2  
Crystal Structure
Not Known  
Body Centered Cubic (BCC)  
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
101  
17
73  
99+
Number of Neutrons
157  
8
108  
29
Number of Electrons
101  
17
73  
99+
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
146.00 pm  
37
Covalent Radius
175.00 pm  
25
170.00 pm  
27
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
180.95 amu  
38
Atomic Volume
19.90 cm3/mol  
32
10.90 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Hafnium
  
Next Element
Nobelium
  
Tungsten
  
Valence Electron Potential
63.70 (-eV)  
23
110.00 (-eV)  
7
Lattice Constant
-  
330.13 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
36
1.41  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
16.69 g/cm3  
18
Density When Liquid (at m.p.)
10.30 g/cm3  
39
15.00 g/cm3  
23
Tensile Strength
80.00 MPa  
29
180.00 MPa  
20
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
69.00 GPa  
13
Bulk Modulus
0.00 GPa  
99+
200.00 GPa  
8
Young's Modulus
12.00 GPa  
99+
186.00 GPa  
14
Poisson Ratio
0.30  
14
0.34  
10
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
16.65  
20
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
27
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.63 nΩ·m  
99+
131.00 nΩ·m  
25
Electrical Conductivity
0.00 106/cm Ω  
99+
0.08 106/cm Ω  
32
Electron Affinity
50.00 kJ/mol  
26
31.00 kJ/mol  
35
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.14 J/(kg K)  
38
Molar Heat Capacity
27.00 J/mol·K  
29
25.36 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
57.50 W/m·K  
27
Critical Temperature
1,100.00 K  
99+
3,290.00 K  
4
Thermal Expansion
11.60 µm/(m·K)  
99+
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
753.10 kJ/mol  
2
Enthalpy of Fusion
-  
31.40 kJ/mol  
3
Enthalpy of Atomization
410.80 kJ/mol  
25
782.00 kJ/mol  
3
Standard Molar Entropy
37.40 J/mol.K  
99+
41.50 J/mol.K  
99+
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