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Technetium vs Gold

Technetium
Gold
Gold vs Technetium


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  
7
225.00  
3
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  
-  
Discovery
In 1937  
Before 6000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
27
Abundance In Sun
0.00 %  
18
0.00 %  
26
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
21
Abundance In Humans
-  
0.00 %  
21
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
-  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
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  
40
0.00 Blood/mg dm-3  
38
In Bone
0.00 p.p.m.  
99+
0.02 p.p.m.  
35
Physical
Melting Point
2,200.00 °C  
9
1,064.43 °C  
99+
Boiling Point
4,877.00 °C  
7
2,807.00 °C  
37
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Gold  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.25  
16
2.50  
15
Brinell Hardness
550.00 MPa  
27
194.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
216.00 MPa  
99+
Speed of Sound
16,200.00 m/s  
1
2,030.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.90  
18
0.47  
99+
Reflectivity
35.00 %  
34
95.00 %  
2
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Au  
Isotopes
  
  
Known Isotopes
18  
21
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.54  
2
Sanderson Electronegativity
1.90  
13
1.50  
18
Allred Rochow Electronegativity
1.36  
21
1.42  
19
Mulliken-Jaffe Electronegativity
1.90  
13
1.87  
15
Allen Electronegativity
1.51  
31
1.92  
7
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  
34
2,856.00 kJ/mol  
33
4th Energy Level
7,020.00 kJ/mol  
14
890.10 kJ/mol  
99+
5th Energy Level
7,020.00 kJ/mol  
28
8,901.00 kJ/mol  
6
6th Energy Level
7,020.00 kJ/mol  
99+
8,901.00 kJ/mol  
24
7th Energy level
4,700.00 kJ/mol  
99+
8,901.00 kJ/mol  
21
8th Energy Level
4,700.00 kJ/mol  
99+
8,900.00 kJ/mol  
20
9th Energy Level
7,020.00 kJ/mol  
35
8,901.00 kJ/mol  
20
10th Energy Level
7,020.00 kJ/mol  
39
8,901.00 kJ/mol  
21
11th Energy Level
7,020.00 kJ/mol  
37
8,901.00 kJ/mol  
19
12th Energy Level
7,020.00 kJ/mol  
99+
8,900.00 kJ/mol  
39
13th Energy Level
7,020.00 kJ/mol  
33
8,900.00 kJ/mol  
14
14th Energy Level
7,020.00 kJ/mol  
23
890.10 kJ/mol  
99+
15th Energy Level
70,200.00 kJ/mol  
29
89,000.00 kJ/mol  
7
16th Energy Level
70,200.00 kJ/mol  
24
890.10 kJ/mol  
99+
17th Energy Level
702.50 kJ/mol  
99+
890.10 kJ/mol  
25
18th Energy Level
7,020.00 kJ/mol  
35
8,901.00 kJ/mol  
14
19th Energy Level
702.00 kJ/mol  
99+
890.10 kJ/mol  
23
20th Energy Level
702.00 kJ/mol  
35
890.00 kJ/mol  
13
21st Energy Level
702.00 kJ/mol  
99+
890.10 kJ/mol  
35
22nd Energy Level
702.00 kJ/mol  
29
890.00 kJ/mol  
11
23rd Energy Level
702.00 kJ/mol  
99+
890.10 kJ/mol  
38
24th Energy Level
702.50 kJ/mol  
28
890.10 kJ/mol  
6
25th Energy Level
702.00 kJ/mol  
30
890.00 kJ/mol  
5
26th Energy Level
702.00 kJ/mol  
29
890.10 kJ/mol  
5
27th Energy Level
702.00 kJ/mol  
30
890.10 kJ/mol  
4
28th Energy Level
702.00 kJ/mol  
35
890.10 kJ/mol  
7
29th Energy Level
702.00 kJ/mol  
36
890.10 kJ/mol  
8
30th Energy Level
702.00 kJ/mol  
30
890.10 kJ/mol  
5
Electrochemical Equivalent
0.52 g/amp-hr  
99+
2.45 g/amp-hr  
25
Electron Work Function
4.90 eV  
12
5.10 eV  
8
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
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  
24
Number of Electrons
43  
99+
79  
37
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
151.00 pm  
34
Covalent Radius
147.00 pm  
39
144.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
166.00 pm  
99+
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  
24
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.61  
18
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
19.30 g/cm3  
15
Density When Liquid (at m.p.)
11.00 g/cm3  
34
17.31 g/cm3  
16
Tensile Strength
50.00 MPa  
38
120.00 MPa  
27
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
25
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
67.00 (Pa)  
4
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
27.00 GPa  
34
Bulk Modulus
100.00 GPa  
16
180.00 GPa  
9
Young's Modulus
50.00 GPa  
39
79.00 GPa  
26
Poisson Ratio
0.38  
6
0.40  
4
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
19.32  
17
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
10
Susceptibility
0.00  
24
0.00  
22
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
2.20 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.45 106/cm Ω  
3
Electron Affinity
53.00 kJ/mol  
23
222.80 kJ/mol  
1
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.13 J/(kg K)  
40
Molar Heat Capacity
24.27 J/mol·K  
99+
25.42 J/mol·K  
99+
Thermal Conductivity
50.60 W/m·K  
30
318.00 W/m·K  
3
Critical Temperature
2,150.00 K  
16
1,337.00 K  
99+
Thermal Expansion
7.10 µm/(m·K)  
99+
14.20 µm/(m·K)  
29
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
324.40 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
12.55 kJ/mol  
33
Enthalpy of Atomization
649.00 kJ/mol  
9
364.00 kJ/mol  
34
Standard Molar Entropy
181.10 J/mol.K  
2
47.40 J/mol.K  
99+
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