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Platinum vs Neptunium

Platinum
Neptunium
Neptunium vs Platinum


Periodic Table
Symbol
Pt  
Np  
Group Number
10  
8
3  
15
Period Number
6  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440064  
99+
7439998  
99+
Space Group Name
Fm_ 3m  
Pnma  
Space Group Number
225.00  
3
62.00  
14
Facts
Interesting Facts
  • Platinum is the rarest metal from the Precious metal categories..
  • Commercially Platinum is produced as a byproduct in ores of nickel.
  
Neptunium was the first transuranium element to be discovered.  
Sources
Mining, Ores of metals, Ores of Minerals  
Made by Bombarding Uranium with Neutrons, Ores of metals  
History
  
  
Who Discovered
Antonio de Ulloa  
Edwin McMillan and Philip H. Abelson  
Discovery
In 1735  
In 1940  
Abundance
  
  
Abundance In Universe
0.00 %  
20
0.00 %  
40
Abundance In Sun
0.00 %  
19
0.00 %  
26
Abundance In Meteorites
0.00 %  
25
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
  • Currently known uses of Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  
Industrial Uses
Aerospace Industry, Chemical Industry  
-  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
-  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Non Toxic  
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
1,772.00 °C  
16
640.00 °C  
99+
Boiling Point
3,827.00 °C  
15
3,902.00 °C  
13
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
3.50  
12
6.00  
6
Brinell Hardness
300.00 MPa  
99+
622.00 MPa  
23
Vickers Hardness
400.00 MPa  
99+
640.00 MPa  
23
Speed of Sound
2,800.00 m/s  
99+
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.41  
6
1.30  
99+
Reflectivity
73.00 %  
10
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pt  
Np  
Isotopes
  
  
Known Isotopes
35  
4
20  
19
Electronegativity
  
  
Pauling Electronegativity
2.28  
4
1.36  
30
Sanderson Electronegativity
2.28  
5
1.36  
23
Allred Rochow Electronegativity
1.44  
18
1.22  
27
Mulliken-Jaffe Electronegativity
2.20  
6
1.36  
31
Allen Electronegativity
1.72  
19
1.36  
37
Electropositivity
  
  
Pauling Electropositivity
1.72  
99+
2.64  
25
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol  
10
604.50 kJ/mol  
99+
2nd Energy Level
1,791.00 kJ/mol  
22
1,128.00 kJ/mol  
99+
3rd Energy Level
2,277.00 kJ/mol  
99+
1,997.00 kJ/mol  
99+
4th Energy Level
8,702.00 kJ/mol  
6
3,242.00 kJ/mol  
99+
5th Energy Level
8,702.00 kJ/mol  
9
6,180.00 kJ/mol  
99+
6th Energy Level
8,700.00 kJ/mol  
27
5,785.00 kJ/mol  
99+
7th Energy level
8,700.00 kJ/mol  
23
6,040.00 kJ/mol  
99+
8th Energy Level
8,700.00 kJ/mol  
23
6,040.00 kJ/mol  
99+
9th Energy Level
5,660.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
10th Energy Level
8,700.00 kJ/mol  
24
6,180.00 kJ/mol  
99+
11th Energy Level
8,700.00 kJ/mol  
21
6,180.00 kJ/mol  
99+
12th Energy Level
8,700.00 kJ/mol  
99+
61,800.00 kJ/mol  
13
13th Energy Level
8,700.00 kJ/mol  
16
6,180.00 kJ/mol  
40
14th Energy Level
870.00 kJ/mol  
99+
6,180.00 kJ/mol  
29
15th Energy Level
87,000.00 kJ/mol  
9
60,600.00 kJ/mol  
99+
16th Energy Level
870.00 kJ/mol  
99+
60,420.00 kJ/mol  
31
17th Energy Level
870.00 kJ/mol  
27
604.00 kJ/mol  
99+
18th Energy Level
8,700.00 kJ/mol  
16
6,040.00 kJ/mol  
99+
19th Energy Level
870.00 kJ/mol  
25
604.50 kJ/mol  
99+
20th Energy Level
870.00 kJ/mol  
15
604.00 kJ/mol  
99+
21st Energy Level
870.00 kJ/mol  
38
6,040.00 kJ/mol  
17
22nd Energy Level
870.00 kJ/mol  
13
604.00 kJ/mol  
40
23rd Energy Level
870.10 kJ/mol  
39
6,040.00 kJ/mol  
18
24th Energy Level
870.00 kJ/mol  
9
604.50 kJ/mol  
99+
25th Energy Level
870.00 kJ/mol  
7
604.00 kJ/mol  
99+
26th Energy Level
870.00 kJ/mol  
7
604.00 kJ/mol  
99+
27th Energy Level
870.10 kJ/mol  
6
604.00 kJ/mol  
99+
28th Energy Level
870.10 kJ/mol  
9
604.00 kJ/mol  
99+
29th Energy Level
870.00 kJ/mol  
10
604.00 kJ/mol  
99+
30th Energy Level
870.00 kJ/mol  
7
604.00 kJ/mol  
99+
Electrochemical Equivalent
1.82 g/amp-hr  
39
1.77 g/amp-hr  
99+
Electron Work Function
5.65 eV  
4
4.90 eV  
12
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
78  
38
93  
25
Electron Configuration
[Xe] 4f14 5d9 6s1  
[Rn] 5f4 6d1 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Orthorhombic (ORTH)  
Crystal Lattice
FCC-Crystal-Structure-of-Platinum.jpg#100  
ORTH-Crystal-Structure-of-Neptunium.jpg#100  
Atom
  
  
Number of Protons
78  
38
93  
25
Number of Neutrons
117  
25
144  
15
Number of Electrons
78  
38
93  
25
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
155.00 pm  
32
Covalent Radius
136.00 pm  
99+
190.00 pm  
18
Van der Waals Radius
175.00 pm  
99+
221.00 pm  
27
Atomic Weight
47.87 amu  
99+
237.00 amu  
22
Atomic Volume
9.09 cm3/mol  
99+
11.62 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Iridium
  
Uranium
  
Next Element
Gold
  
Plutonium
  
Valence Electron Potential
392.42 (-eV)  
1
96.00 (-eV)  
9
Lattice Constant
392.42 pm  
27
666.30 pm  
3
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.56  
99+
1.43  
99+
Mechanical
Density
  
  
Density At Room Temperature
21.45 g/cm3  
11
19.38 g/cm3  
14
Density When Liquid (at m.p.)
19.77 g/cm3  
12
20.25 g/cm3  
10
Tensile Strength
125.00 MPa  
26
125.00 MPa  
26
Viscosity
0.00  
16
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.07 (Pa)  
18
0.11 (Pa)  
17
Elasticity properties
  
  
Shear Modulus
61.00 GPa  
14
5.60 GPa  
99+
Bulk Modulus
230.00 GPa  
6
180.00 GPa  
9
Young's Modulus
168.00 GPa  
15
46.00 GPa  
99+
Poisson Ratio
0.38  
6
0.26  
22
Other Mechanical Properties
Ductile, Malleable  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
21.45  
13
20.25  
15
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
14
0.00 H/m  
6
Susceptibility
0.00  
20
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
105.00 nΩ·m  
30
1.22 nΩ·m  
99+
Electrical Conductivity
0.10 106/cm Ω  
26
0.01 106/cm Ω  
99+
Electron Affinity
205.30 kJ/mol  
2
118.60 kJ/mol  
6
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.12 J/(kg K)  
99+
Molar Heat Capacity
25.86 J/mol·K  
99+
29.46 J/mol·K  
10
Thermal Conductivity
71.60 W/m·K  
24
6.30 W/m·K  
99+
Critical Temperature
2,041.00 K  
19
913.00 K  
99+
Thermal Expansion
8.80 µm/(m·K)  
99+
13.30 µm/(m·K)  
35
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol  
15
336.00 kJ/mol  
39
Enthalpy of Fusion
19.70 kJ/mol  
12
3.20 kJ/mol  
99+
Enthalpy of Atomization
565.00 kJ/mol  
15
275.30 kJ/mol  
99+
Standard Molar Entropy
41.60 J/mol.K  
99+
64.00 J/mol.K  
21
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