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Mendelevium vs Ruthenium

Mendelevium
Ruthenium
Ruthenium vs Mendelevium


Periodic Table
Symbol
Md  
Ru  
Group Number
3  
15
8  
10
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7440188  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • Ruthenium element has been extracted from used nuclear fuel.
  • Ruthenium metal also produces as a by-product of the Nickel mining.
  
Sources
Bombarding Einsteinium with Helium Ions  
By-product of Nickel Refining, Found in Minerals, Mining  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Karl Ernst Claus  
Discovery
In 1955  
In 1844  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
21
Abundance In Sun
-  
0.00 %  
22
Abundance In Meteorites
0.00 %  
99+
0.00 %  
26
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
38
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • It is used for producing chip resistors and contact.
  • Ruthenium oxide is used to coat the anodes cells for chlorine production in chemical industry. It also works as catalysts for ammonia and acetic acid reaction.
  
Industrial Uses
-  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
Medical Research  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
827.00 °C  
99+
2,250.00 °C  
8
Boiling Point
0.00 °C  
99+
3,900.00 °C  
14
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
-  
6.50  
5
Brinell Hardness
350.00 MPa  
36
2,160.00 MPa  
3
Vickers Hardness
0.00 MPa  
99+
1,160.00 MPa  
14
Speed of Sound
2,680.00 m/s  
99+
5,970.00 m/s  
7
Optical Properties
  
  
Refractive Index
1.30  
99+
2.60  
4
Reflectivity
66.00 %  
17
6.00 %  
38
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
Ru  
Isotopes
  
  
Known Isotopes
16  
23
26  
13
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.20  
5
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.20  
28
1.42  
19
Mulliken-Jaffe Electronegativity
1.30  
33
2.20  
6
Allen Electronegativity
1.30  
40
1.54  
28
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.80  
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
710.20 kJ/mol  
32
2nd Energy Level
1,235.00 kJ/mol  
99+
710.22 kJ/mol  
99+
3rd Energy Level
2,470.00 kJ/mol  
99+
2,747.00 kJ/mol  
38
4th Energy Level
3,840.00 kJ/mol  
99+
7,107.00 kJ/mol  
12
5th Energy Level
6,350.00 kJ/mol  
36
7,107.00 kJ/mol  
27
6th Energy Level
6,350.00 kJ/mol  
99+
7,107.00 kJ/mol  
99+
7th Energy level
6,350.00 kJ/mol  
99+
7,100.00 kJ/mol  
37
8th Energy Level
6,350.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
9th Energy Level
6,350.00 kJ/mol  
99+
5,600.00 kJ/mol  
99+
10th Energy Level
6,350.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
6,400.00 kJ/mol  
99+
7,197.00 kJ/mol  
32
12th Energy Level
60,100.00 kJ/mol  
16
7,190.00 kJ/mol  
99+
13th Energy Level
6,350.00 kJ/mol  
37
7,100.00 kJ/mol  
29
14th Energy Level
1,150.00 kJ/mol  
99+
710.00 kJ/mol  
99+
15th Energy Level
63,500.00 kJ/mol  
37
71,000.00 kJ/mol  
25
16th Energy Level
635.00 kJ/mol  
99+
71,000.00 kJ/mol  
21
17th Energy Level
1,107.00 kJ/mol  
21
710.20 kJ/mol  
99+
18th Energy Level
6,350.00 kJ/mol  
39
7,100.00 kJ/mol  
31
19th Energy Level
635.00 kJ/mol  
99+
710.20 kJ/mol  
38
20th Energy Level
635.00 kJ/mol  
40
710.00 kJ/mol  
32
21st Energy Level
6,350.00 kJ/mol  
13
710.20 kJ/mol  
99+
22nd Energy Level
635.00 kJ/mol  
34
710.00 kJ/mol  
26
23rd Energy Level
6,350.00 kJ/mol  
13
710.20 kJ/mol  
99+
24th Energy Level
635.00 kJ/mol  
36
710.20 kJ/mol  
25
25th Energy Level
635.00 kJ/mol  
38
710.00 kJ/mol  
26
26th Energy Level
635.00 kJ/mol  
37
710.20 kJ/mol  
25
27th Energy Level
635.00 kJ/mol  
39
710.20 kJ/mol  
25
28th Energy Level
635.00 kJ/mol  
99+
710.20 kJ/mol  
30
29th Energy Level
635.00 kJ/mol  
99+
710.20 kJ/mol  
31
30th Energy Level
635.00 kJ/mol  
40
710.00 kJ/mol  
25
Electrochemical Equivalent
3.21 g/amp-hr  
13
1.26 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
4.71 eV  
14
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
101  
17
44  
99+
Electron Configuration
[Rn] 5f13 7s2  
[Kr] 4d7 5s1  
Crystal Structure
Not Known  
Hexagonal Close Packed (HCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
rystal-Structure-of-Ruthenium.jpg#100  
Atom
  
  
Number of Protons
101  
17
44  
99+
Number of Neutrons
157  
8
57  
99+
Number of Electrons
101  
17
44  
99+
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
134.00 pm  
99+
Covalent Radius
175.00 pm  
25
146.00 pm  
40
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
101.07 amu  
99+
Atomic Volume
19.90 cm3/mol  
32
8.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Technetium
  
Next Element
Nobelium
  
Rhodium
  
Valence Electron Potential
63.70 (-eV)  
23
64.00 (-eV)  
22
Lattice Constant
-  
270.59 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.58  
36
1.58  
33
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
12.45 g/cm3  
29
Density When Liquid (at m.p.)
10.30 g/cm3  
39
10.65 g/cm3  
37
Tensile Strength
80.00 MPa  
29
50.00 MPa  
38
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)  
23
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
173.00 GPa  
4
Bulk Modulus
0.00 GPa  
99+
220.00 GPa  
7
Young's Modulus
12.00 GPa  
99+
447.00 GPa  
3
Poisson Ratio
0.30  
14
0.30  
14
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
12.45  
31
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.63 nΩ·m  
99+
71.00 nΩ·m  
38
Electrical Conductivity
0.00 106/cm Ω  
99+
0.14 106/cm Ω  
18
Electron Affinity
50.00 kJ/mol  
26
101.30 kJ/mol  
11
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.24 J/(kg K)  
24
Molar Heat Capacity
27.00 J/mol·K  
29
24.06 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
117.00 W/m·K  
13
Critical Temperature
1,100.00 K  
99+
2,607.00 K  
9
Thermal Expansion
11.60 µm/(m·K)  
99+
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
567.80 kJ/mol  
13
Enthalpy of Fusion
-  
25.50 kJ/mol  
7
Enthalpy of Atomization
410.80 kJ/mol  
25
603.00 kJ/mol  
10
Standard Molar Entropy
37.40 J/mol.K  
99+
28.50 J/mol.K  
99+
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