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Palladium vs Technetium

Palladium
Technetium
Technetium vs Palladium


Periodic Table
Symbol
Pd  
Tc  
Group Number
10  
8
7  
11
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440053  
99+
7440268  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • Palladium alloys are used for Jewelry contains (95% Palladium and 5% Ruthenium)
  • In the late 1800s, Palladium metal used have more economical value than the Platinum metal.
  • Palladium element is known as a good catalyst
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Ores of metals  
Made by Bombarding Molybdenum with Deuterons  
History
  
  
Who Discovered
William Hyde Wollaston  
Emilio Segrè and Carlo Perriero  
Discovery
In 1803  
In 1937  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
40
Abundance In Sun
0.00 %  
24
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • Mostly palladium metal is used in catalytic converters. In electronic industry it is used in ceramic capacitors of mobile and computer.
  • It is used in jewellery and dental fillings and crowns.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electronic Industry  
-  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
-  
Other Uses
Coinage, Bullion, Jewellery  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,554.90 °C  
22
2,200.00 °C  
9
Boiling Point
2,963.00 °C  
34
4,877.00 °C  
7
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Shiny Gray  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
4.75  
9
2.25  
16
Brinell Hardness
320.00 MPa  
40
550.00 MPa  
27
Vickers Hardness
121.00 MPa  
99+
500.00 MPa  
35
Speed of Sound
3,070.00 m/s  
38
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
1.72  
25
1.90  
18
Reflectivity
84.00 %  
5
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pd  
Tc  
Isotopes
  
  
Known Isotopes
38  
1
18  
21
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.90  
12
Sanderson Electronegativity
2.20  
8
1.90  
13
Allred Rochow Electronegativity
1.35  
22
1.36  
21
Mulliken-Jaffe Electronegativity
2.20  
6
1.90  
13
Allen Electronegativity
1.59  
25
1.51  
31
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.10  
99+
Ionization Energies
  
  
1st Energy Level
520.23 kJ/mol  
99+
702.00 kJ/mol  
36
2nd Energy Level
7,298.22 kJ/mol  
2
1,470.00 kJ/mol  
99+
3rd Energy Level
11,815.13 kJ/mol  
3
2,850.00 kJ/mol  
34
4th Energy Level
870.00 kJ/mol  
99+
7,020.00 kJ/mol  
14
5th Energy Level
8,044.00 kJ/mol  
13
7,020.00 kJ/mol  
28
6th Energy Level
8,044.00 kJ/mol  
33
7,020.00 kJ/mol  
99+
7th Energy level
8,040.00 kJ/mol  
27
4,700.00 kJ/mol  
99+
8th Energy Level
8,040.00 kJ/mol  
27
4,700.00 kJ/mol  
99+
9th Energy Level
8,040.00 kJ/mol  
24
7,020.00 kJ/mol  
35
10th Energy Level
8,040.00 kJ/mol  
28
7,020.00 kJ/mol  
39
11th Energy Level
8,040.00 kJ/mol  
27
7,020.00 kJ/mol  
37
12th Energy Level
8,040.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
13th Energy Level
5,310.00 kJ/mol  
99+
7,020.00 kJ/mol  
33
14th Energy Level
804.40 kJ/mol  
99+
7,020.00 kJ/mol  
23
15th Energy Level
80,400.00 kJ/mol  
16
70,200.00 kJ/mol  
29
16th Energy Level
804.40 kJ/mol  
99+
70,200.00 kJ/mol  
24
17th Energy Level
804.40 kJ/mol  
33
702.50 kJ/mol  
99+
18th Energy Level
8,045.00 kJ/mol  
22
7,020.00 kJ/mol  
35
19th Energy Level
804.40 kJ/mol  
30
702.00 kJ/mol  
99+
20th Energy Level
804.00 kJ/mol  
23
702.00 kJ/mol  
35
21st Energy Level
804.40 kJ/mol  
99+
702.00 kJ/mol  
99+
22nd Energy Level
804.00 kJ/mol  
18
702.00 kJ/mol  
29
23rd Energy Level
804.40 kJ/mol  
99+
702.00 kJ/mol  
99+
24th Energy Level
804.40 kJ/mol  
14
702.50 kJ/mol  
28
25th Energy Level
804.40 kJ/mol  
12
702.00 kJ/mol  
30
26th Energy Level
804.40 kJ/mol  
12
702.00 kJ/mol  
29
27th Energy Level
804.40 kJ/mol  
11
702.00 kJ/mol  
30
28th Energy Level
804.40 kJ/mol  
17
702.00 kJ/mol  
35
29th Energy Level
804.40 kJ/mol  
16
702.00 kJ/mol  
36
30th Energy Level
804.00 kJ/mol  
12
702.00 kJ/mol  
30
Electrochemical Equivalent
1.99 g/amp-hr  
34
0.52 g/amp-hr  
99+
Electron Work Function
5.12 eV  
7
4.90 eV  
12
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
46  
99+
43  
99+
Electron Configuration
[Kr] 4d10  
[Kr] 4d5 5s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Palladium.jpg#100  
HCP-Crystal-Structure-of-Technetium.jpg#100  
Atom
  
  
Number of Protons
46  
99+
43  
99+
Number of Neutrons
60  
99+
55  
99+
Number of Electrons
46  
99+
43  
99+
Radius of an Atom
  
  
Atomic Radius
137.00 pm  
99+
136.00 pm  
99+
Covalent Radius
139.00 pm  
99+
147.00 pm  
39
Van der Waals Radius
163.00 pm  
99+
200.00 pm  
35
Atomic Weight
106.42 amu  
99+
98.00 amu  
99+
Atomic Volume
8.90 cm3/mol  
99+
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rhodium
  
Molybdenum
  
Next Element
Silver
  
Ruthenium
  
Valence Electron Potential
33.00 (-eV)  
99+
180.00 (-eV)  
3
Lattice Constant
389.07 pm  
28
273.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.56  
99+
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
12.02 g/cm3  
31
11.00 g/cm3  
36
Density When Liquid (at m.p.)
10.38 g/cm3  
38
11.00 g/cm3  
34
Tensile Strength
550.00 MPa  
8
50.00 MPa  
38
Viscosity
0.00  
14
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
29
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
44.00 GPa  
17
27.00 GPa  
34
Bulk Modulus
180.00 GPa  
9
100.00 GPa  
16
Young's Modulus
121.00 GPa  
18
50.00 GPa  
39
Poisson Ratio
0.39  
5
0.38  
6
Other Mechanical Properties
Ductile, Malleable, Weldable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
12.02  
33
11.50  
37
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
18
0.00 H/m  
17
Susceptibility
0.00  
27
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
105.40 nΩ·m  
29
200.00 nΩ·m  
18
Electrical Conductivity
0.10 106/cm Ω  
27
0.07 106/cm Ω  
35
Electron Affinity
54.23 kJ/mol  
21
53.00 kJ/mol  
23
Thermal
Specific Heat
0.24 J/(kg K)  
23
0.21 J/(kg K)  
30
Molar Heat Capacity
25.98 J/mol·K  
99+
24.27 J/mol·K  
99+
Thermal Conductivity
71.80 W/m·K  
23
50.60 W/m·K  
30
Critical Temperature
1,825.00 K  
26
2,150.00 K  
16
Thermal Expansion
11.80 µm/(m·K)  
99+
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
376.60 kJ/mol  
28
660.00 kJ/mol  
7
Enthalpy of Fusion
16.74 kJ/mol  
18
23.01 kJ/mol  
9
Enthalpy of Atomization
393.30 kJ/mol  
29
649.00 kJ/mol  
9
Standard Molar Entropy
37.60 J/mol.K  
99+
181.10 J/mol.K  
2
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