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Technetium Gold Comparison

Technetium
Gold
Gold Technetium comparison


Periodic Table
Symbol
Tc   
Au   
Group Number
7   
11
11   
7
Period Number
5   
6   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440268   
99+
7440575   
31
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • 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
Made by Bombarding Molybdenum with Deuterons   
Earth's crust, Mining, Ores of metals   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Unknown   
Discovery
In 1937   
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
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • 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
Alloys, Nuclear Research, Research Purposes   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Low Toxic   
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
2,200.00 °C   
9
1,064.43 °C   
99+
Boiling Point
4,877.00 °C   
7
2,807.00 °C   
36
Appearance
  
  
Physical State
Solid   
Solid   
Color
Shiny Gray   
Gold   
Luster
NA   
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
16,200.00 m/s   
1
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
Tc   
Au   
Isotopes
  
  
Known Isotopes
18   
21
36   
3
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
2.54   
1
Allred Rochow Electronegativity
1.36   
20
1.42   
18
Mulliken-Jaffe Electronegativity
Not Available   
1.87   
7
Allen Electronegativity
1.51   
28
1.92   
5
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
1.46   
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
890.10 kJ/mol   
8
2nd Energy Level
1,470.00 kJ/mol   
99+
1,980.00 kJ/mol   
12
3rd Energy Level
2,850.00 kJ/mol   
33
Not Available   
Electrochemical Equivalent
0.52 g/amp-hr   
99+
2.45 g/amp-hr   
21
Electron Work Function
Not Available   
5.10 eV   
4
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
43   
99+
79   
37
Electron Configuration
[Kr] 4d5 5s2   
[Xe] 4f14 5d10 6s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
FCC-Crystal-Structure-of-Gold.jpg#100   
Atom
  
  
Number of Protons
43   
99+
79   
37
Number of Neutrons
55   
99+
118   
23
Number of Electrons
43   
99+
79   
37
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
151.00 pm   
32
Covalent Radius
147.00 pm   
37
144.00 pm   
40
Van der Waals Radius
200.00 pm   
28
166.00 pm   
39
Atomic Weight
98.00 amu   
99+
196.97 amu   
33
Atomic Volume
8.50 cm3/mol   
99+
10.20 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Platinum
  
Next Element
Ruthenium
  
Mercury
  
Valence Electron Potential
180.00 (-eV)   
3
43.40 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
407.82 pm   
21
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.60   
5
1.61   
4
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
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
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
19.32   
8
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
200.00 nΩ·m   
18
2.20 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.45 106/cm Ω   
3
Electron Affinity
53.00 kJ/mol   
18
222.80 kJ/mol   
1
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.13 J/(kg K)   
39
Molar Heat Capacity
24.27 J/mol·K   
99+
25.42 J/mol·K   
40
Thermal Conductivity
50.60 W/m·K   
30
318.00 W/m·K   
3
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
14.20 µm/(m·K)   
26
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
324.40 kJ/mol   
27
Enthalpy of Fusion
23.01 kJ/mol   
9
12.55 kJ/mol   
27
Enthalpy of Atomization
649.00 kJ/mol   
8
364.00 kJ/mol   
25
Standard Molar Entropy
181.10 J/mol.K   
2
47.40 J/mol.K   
32
Summary >>
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