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Mendelevium vs Gold

Mendelevium
Gold
Gold vs Mendelevium


Periodic Table
Symbol
Md  
Au  
Group Number
Not Available  
11  
7
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7440575  
31
Space Group Name
Not Available  
Fm_ 3m  
Space Group Number
Not Available  
225.00  
2
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
Sources
Bombarding Einsteinium with Helium Ions  
Earth's crust, Mining, Ores of metals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Unknown  
Discovery
In 1955  
Before 6000 BCE  
Abundance
  
  
Abundance In Universe
Not Available  
6 * 10-8 %  
26
Abundance In Sun
~-9999 %  
~0.0000001 %  
26
Abundance In Meteorites
Not Available  
0.00 %  
99+
Abundance In Earth's Crust
Not Available  
0.00 %  
99+
Abundance In Oceans
Not Available  
0.00 %  
21
Abundance In Humans
Not Available  
0.00 %  
18
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
Industrial Uses
NA  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
Dentistry, Pharmaceutical Industry  
Other Uses
NA  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Unknown  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
35
In Bone
0.00 p.p.m.  
36
0.02 p.p.m.  
30
Physical Properties
Melting Point
827.00 °C  
99+
1,064.43 °C  
99+
Boiling Point
Not Available  
2,807.00 °C  
36
Appearance
  
  
Physical State
Solid  
Solid  
Color
Unknown  
Gold  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
2.50  
14
Brinell Hardness
Not Available  
194.00 MPa  
99+
Vickers Hardness
Not Available  
216.00 MPa  
31
Speed of Sound
Not Available  
2,030.00 m/s  
99+
Optical Properties
  
  
Reflectivity
Not Available  
95.00 %  
2
Allotropes
No  
No  
α Allotropes
Not Available  
Not Available  
β Allotropes
Not Available  
Not Available  
γ Allotropes
Not Available  
Not Available  
Chemical Properties
Chemical Formula
Md  
Au  
Isotopes
  
  
Known Isotopes
16  
23
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.30  
32
2.54  
1
Allred Rochow Electronegativity
1.20  
27
1.42  
18
Mulliken-Jaffe Electronegativity
Not Available  
1.87  
7
Allen Electronegativity
Not Available  
1.92  
5
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.46  
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
890.10 kJ/mol  
8
2nd Energy Level
1,235.00 kJ/mol  
99+
1,980.00 kJ/mol  
12
3rd Energy Level
2,470.00 kJ/mol  
99+
Not Available  
4th Energy Level
3,840.00 kJ/mol  
99+
Not Available  
Electrochemical Equivalent
3.21 g/amp-hr  
12
2.45 g/amp-hr  
21
Electron Work Function
Not Available  
5.10 eV  
4
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Ionization, Solubility  
Atomic Properties
Atomic Number
101  
17
79  
37
Electron Configuration
[Rn] 5f13 7s2  
[Xe] 4f14 5d10 6s1  
Crystal Structure
Not Known  
Face Centered Cubic (FCC)  
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
FCC-Crystal-Structure-of-Gold.jpg#100  
Atom
  
  
Number of Protons
101  
17
79  
37
Number of Neutrons
157  
7
118  
23
Number of Electrons
101  
17
79  
37
Radius of an Atom
  
  
Atomic Radius
Not Available  
151.00 pm  
32
Covalent Radius
Not Available  
144.00 pm  
40
Van der Waals Radius
246.00 pm  
8
166.00 pm  
39
Atomic Weight
258.00 amu  
14
196.97 amu  
33
Atomic Volume
Not Available  
10.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Platinum
  
Next Element
Nobelium
  
Mercury
  
Valence Electron Potential
Not Available  
43.40 (-eV)  
99+
Lattice Constant
Not Available  
407.82 pm  
21
Lattice Angles
NA  
π/2, π/2, π/2  
Lattice C/A Ratio
Not Available  
1.61  
4
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available  
19.30 g/cm3  
15
Density When Liquid (at m.p.)
Not Available  
17.31 g/cm3  
6
Tensile Strength
Not Available  
120.00 MPa  
15
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available  
0.00 (Pa)  
23
Vapor Pressure at 2000 K
Not Available  
67.00 (Pa)  
4
Elasticity properties
  
  
Shear Modulus
Not Available  
27.00 GPa  
27
Bulk Modulus
Not Available  
180.00 GPa  
9
Young's Modulus
Not Available  
79.00 GPa  
24
Poisson Ratio
Not Available  
0.40  
4
Other Mechanical Properties
Unknown  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available  
19.32  
8
Magnetic Ordering
Unknown  
Diamagnetic  
Electrical Properties
  
  
Electrical Property
Unknown  
Conductor  
Resistivity
Not Available  
2.20 nΩ·m  
99+
Electrical Conductivity
Not Available  
0.45 106/cm Ω  
3
Electron Affinity
Not Available  
222.80 kJ/mol  
1
Thermal Properties
Specific Heat
Not Available  
0.13 J/(kg K)  
39
Molar Heat Capacity
Not Available  
25.42 J/mol·K  
40
Thermal Conductivity
Not Available  
318.00 W/m·K  
3
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
14.20 µm/(m·K)  
26
Enthalpy
  
  
Enthalpy of Vaporization
Not Available  
324.40 kJ/mol  
27
Enthalpy of Fusion
Not Available  
12.55 kJ/mol  
27
Enthalpy of Atomization
Not Available  
364.00 kJ/mol  
25
Standard Molar Entropy
Not Available  
47.40 J/mol.K  
32
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