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Tantalum vs Mendelevium

Tantalum
Mendelevium
Mendelevium vs Tantalum


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