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Palladium Protactinium Comparison

Palladium
Protactinium
Protactinium Palladium comparison


Periodic Table
Symbol
Pd  
Pa  
Group Number
10  
8
3  
15
Period Number
5  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440053  
99+
7440133  
99+
Space Group Name
Fm_ 3m  
I4/mmm  
Space Group Number
225.00  
3
139.00  
11
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
  
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  
Sources
Ores of metals  
Found in Uranium Ores, Mining, Ores of metals  
History
  
  
Who Discovered
William Hyde Wollaston  
William Crookes  
Discovery
In 1803  
In 1900  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
17
Abundance In Sun
0.00 %  
24
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 %  
99+
Abundance In Humans
0.00 %  
24
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.
  
  • Currently known uses of Protactinium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electronic Industry  
-  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
-  
Other Uses
Coinage, Bullion, Jewellery  
-  
Biological Properties
  
  
Toxicity
Toxic  
Highly 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
1,568.00 °C  
21
Boiling Point
2,963.00 °C  
34
4,027.00 °C  
12
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.75  
9
5.00  
8
Brinell Hardness
320.00 MPa  
40
125.00 MPa  
99+
Vickers Hardness
121.00 MPa  
99+
220.00 MPa  
99+
Speed of Sound
3,070.00 m/s  
38
12,400.00 m/s  
3
Optical Properties
  
  
Refractive Index
1.72  
25
1.60  
33
Reflectivity
84.00 %  
5
60.00 %  
23
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pd  
Pa  
Isotopes
  
  
Known Isotopes
38  
1
27  
12
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.50  
28
Sanderson Electronegativity
2.20  
8
1.50  
18
Allred Rochow Electronegativity
1.35  
22
1.14  
29
Mulliken-Jaffe Electronegativity
2.20  
6
1.50  
26
Allen Electronegativity
1.59  
25
1.50  
32
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.50  
27
Ionization Energies
  
  
1st Energy Level
520.23 kJ/mol  
99+
568.00 kJ/mol  
99+
2nd Energy Level
7,298.22 kJ/mol  
2
1,128.00 kJ/mol  
99+
3rd Energy Level
11,815.13 kJ/mol  
3
1,814.00 kJ/mol  
99+
4th Energy Level
870.00 kJ/mol  
99+
2,991.00 kJ/mol  
99+
5th Energy Level
8,044.00 kJ/mol  
13
5,120.00 kJ/mol  
99+
6th Energy Level
8,044.00 kJ/mol  
33
5,680.00 kJ/mol  
99+
7th Energy level
8,040.00 kJ/mol  
27
5,680.00 kJ/mol  
99+
8th Energy Level
8,040.00 kJ/mol  
27
5,680.00 kJ/mol  
99+
9th Energy Level
8,040.00 kJ/mol  
24
5,120.00 kJ/mol  
99+
10th Energy Level
8,040.00 kJ/mol  
28
5,120.00 kJ/mol  
99+
11th Energy Level
8,040.00 kJ/mol  
27
5,680.00 kJ/mol  
99+
12th Energy Level
8,040.00 kJ/mol  
99+
5,680.00 kJ/mol  
99+
13th Energy Level
5,310.00 kJ/mol  
99+
5,680.00 kJ/mol  
99+
14th Energy Level
804.40 kJ/mol  
99+
5,680.00 kJ/mol  
99+
15th Energy Level
80,400.00 kJ/mol  
16
56,800.00 kJ/mol  
99+
16th Energy Level
804.40 kJ/mol  
99+
56,800.00 kJ/mol  
99+
17th Energy Level
804.40 kJ/mol  
33
568.50 kJ/mol  
99+
18th Energy Level
8,045.00 kJ/mol  
22
5,680.00 kJ/mol  
99+
19th Energy Level
804.40 kJ/mol  
30
568.30 kJ/mol  
99+
20th Energy Level
804.00 kJ/mol  
23
568.00 kJ/mol  
99+
21st Energy Level
804.40 kJ/mol  
99+
568.00 kJ/mol  
99+
22nd Energy Level
804.00 kJ/mol  
18
568.00 kJ/mol  
99+
23rd Energy Level
804.40 kJ/mol  
99+
568.00 kJ/mol  
99+
24th Energy Level
804.40 kJ/mol  
14
568.00 kJ/mol  
99+
25th Energy Level
804.40 kJ/mol  
12
568.00 kJ/mol  
99+
26th Energy Level
804.40 kJ/mol  
12
568.00 kJ/mol  
99+
27th Energy Level
804.40 kJ/mol  
11
568.00 kJ/mol  
99+
28th Energy Level
804.40 kJ/mol  
17
568.00 kJ/mol  
99+
29th Energy Level
804.40 kJ/mol  
16
568.00 kJ/mol  
99+
30th Energy Level
804.00 kJ/mol  
12
568.00 kJ/mol  
99+
Electrochemical Equivalent
1.99 g/amp-hr  
34
1.72 g/amp-hr  
99+
Electron Work Function
5.12 eV  
7
5.89 eV  
3
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
46  
99+
91  
27
Electron Configuration
[Kr] 4d10  
[Rn] 5f2 6d1 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Tetragonal (TETR)  
Crystal Lattice
FCC-Crystal-Structure-of-Palladium.jpg#100  
TETR-Crystal-Structure-of-Protactinium.jpg#100  
Atom
  
  
Number of Protons
46  
99+
91  
27
Number of Neutrons
60  
99+
122  
22
Number of Electrons
46  
99+
91  
27
Radius of an Atom
  
  
Atomic Radius
137.00 pm  
99+
163.00 pm  
27
Covalent Radius
139.00 pm  
99+
200.00 pm  
11
Van der Waals Radius
163.00 pm  
99+
243.00 pm  
15
Atomic Weight
106.42 amu  
99+
231.04 amu  
24
Atomic Volume
8.90 cm3/mol  
99+
15.00 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rhodium
  
Thorium
  
Next Element
Silver
  
Uranium
  
Valence Electron Potential
33.00 (-eV)  
99+
92.00 (-eV)  
11
Lattice Constant
389.07 pm  
28
392.50 pm  
26
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.56  
99+
1.58  
36
Mechanical
Density
  
  
Density At Room Temperature
12.02 g/cm3  
31
15.37 g/cm3  
20
Density When Liquid (at m.p.)
10.38 g/cm3  
38
15.37 g/cm3  
21
Tensile Strength
550.00 MPa  
8
80.00 MPa  
29
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)  
32
Elasticity properties
  
  
Shear Modulus
44.00 GPa  
17
16.00 GPa  
99+
Bulk Modulus
180.00 GPa  
9
47.00 GPa  
26
Young's Modulus
121.00 GPa  
18
47.00 GPa  
99+
Poisson Ratio
0.39  
5
0.23  
30
Other Mechanical Properties
Ductile, Malleable, Weldable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
12.02  
33
15.37  
23
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
18
0.00 H/m  
10
Susceptibility
0.00  
27
0.00  
21
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
105.40 nΩ·m  
29
177.00 nΩ·m  
21
Electrical Conductivity
0.10 106/cm Ω  
27
0.05 106/cm Ω  
39
Electron Affinity
54.23 kJ/mol  
21
53.03 kJ/mol  
22
Thermal
Specific Heat
0.24 J/(kg K)  
23
0.12 J/(kg K)  
99+
Molar Heat Capacity
25.98 J/mol·K  
99+
27.20 J/mol·K  
24
Thermal Conductivity
71.80 W/m·K  
23
47.00 W/m·K  
32
Critical Temperature
1,825.00 K  
26
1,841.00 K  
25
Thermal Expansion
11.80 µm/(m·K)  
99+
9.90 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
376.60 kJ/mol  
28
481.00 kJ/mol  
17
Enthalpy of Fusion
16.74 kJ/mol  
18
12.34 kJ/mol  
34
Enthalpy of Atomization
393.30 kJ/mol  
29
481.90 kJ/mol  
19
Standard Molar Entropy
37.60 J/mol.K  
99+
198.10 J/mol.K  
1
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