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Neptunium vs Platinum

Neptunium
Platinum
Platinum vs Neptunium


Periodic Table
Symbol
Np   
Pt   
Group Number
Not Available   
10   
8
Period Number
7   
6   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7439998   
99+
7440064   
99+
Space Group Name
Pnma   
Fm_ 3m   
Space Group Number
62.00   
11
225.00   
2
Facts
Interesting Facts
Not Available   
  • Platinum is the rarest metal from the Precious metal categories..
  • Commercially Platinum is produced as a byproduct in ores of nickel.
  
Sources
Made by Bombarding Uranium with Neutrons, Ores of metals   
Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Edwin McMillan and Philip H. Abelson   
Antonio de Ulloa   
Discovery
In 1940   
In 1735   
Abundance
  
  
Abundance In Universe
Not Available   
5 * 10-7 %   
19
Abundance In Sun
~-9999 %   
~0.0000009 %   
19
Abundance In Meteorites
Not Available   
0.00 %   
25
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Uses
Uses & Benefits
  • Currently known uses of Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
Industrial Uses
NA   
Aerospace Industry, Chemical Industry   
Medical Uses
NA   
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Toxic   
Non Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
640.00 °C   
99+
1,772.00 °C   
16
Boiling Point
3,902.00 °C   
13
3,827.00 °C   
15
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
3.50   
11
Brinell Hardness
Not Available   
300.00 MPa   
34
Vickers Hardness
Not Available   
400.00 MPa   
25
Speed of Sound
Not Available   
2,800.00 m/s   
29
Optical Properties
  
  
Reflectivity
Not Available   
73.00 %   
8
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
Np   
Pt   
Isotopes
  
  
Known Isotopes
20   
19
35   
4
Electronegativity
  
  
Pauling Electronegativity
1.36   
29
2.28   
3
Allred Rochow Electronegativity
1.22   
26
1.44   
17
Allen Electronegativity
Not Available   
1.72   
16
Electropositivity
  
  
Pauling Electropositivity
2.64   
25
1.72   
99+
Ionization Energies
  
  
1st Energy Level
604.50 kJ/mol   
99+
870.00 kJ/mol   
10
2nd Energy Level
1,128.00 kJ/mol   
99+
1,791.00 kJ/mol   
21
3rd Energy Level
1,997.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,242.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.77 g/amp-hr   
39
1.82 g/amp-hr   
35
Electron Work Function
Not Available   
5.65 eV   
1
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Anti Corrosion, Ionization   
Atomic Properties
Atomic Number
93   
25
78   
38
Electron Configuration
[Rn] 5f4 6d1 7s2   
[Xe] 4f14 5d9 6s1   
Crystal Structure
Orthorhombic (ORTH)   
Face Centered Cubic (FCC)   
Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
FCC-Crystal-Structure-of-Platinum.jpg#100   
Atom
  
  
Number of Protons
93   
25
78   
38
Number of Neutrons
144   
14
117   
24
Number of Electrons
93   
25
78   
38
Radius of an Atom
  
  
Atomic Radius
155.00 pm   
30
139.00 pm   
39
Covalent Radius
190.00 pm   
18
136.00 pm   
99+
Van der Waals Radius
221.00 pm   
22
175.00 pm   
36
Atomic Weight
237.00 amu   
22
47.87 amu   
99+
Atomic Volume
11.62 cm3/mol   
99+
9.09 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Uranium
  
Iridium
  
Next Element
Plutonium
  
Gold
  
Valence Electron Potential
96.00 (-eV)   
9
392.42 (-eV)   
1
Lattice Constant
666.30 pm   
3
392.42 pm   
24
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
19.38 g/cm3   
14
21.45 g/cm3   
11
Density When Liquid (at m.p.)
Not Available   
19.77 g/cm3   
2
Tensile Strength
125.00 MPa   
14
125.00 MPa   
14
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.11 (Pa)   
17
0.07 (Pa)   
18
Elasticity properties
  
  
Shear Modulus
Not Available   
61.00 GPa   
14
Bulk Modulus
Not Available   
230.00 GPa   
6
Young's Modulus
Not Available   
168.00 GPa   
14
Poisson Ratio
Not Available   
0.38   
6
Other Mechanical Properties
Ductile   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
20.25   
6
21.45   
4
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Permeability
Not Available   
0.00 H/m   
3
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
1.22 nΩ·m   
99+
105.00 nΩ·m   
30
Electrical Conductivity
0.01 106/cm Ω   
99+
0.10 106/cm Ω   
21
Electron Affinity
Not Available   
205.30 kJ/mol   
2
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.13 J/(kg K)   
39
Molar Heat Capacity
29.46 J/mol·K   
8
25.86 J/mol·K   
35
Thermal Conductivity
6.30 W/m·K   
99+
71.60 W/m·K   
24
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
8.80 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
510.50 kJ/mol   
11
Enthalpy of Fusion
3.20 kJ/mol   
99+
19.70 kJ/mol   
12
Enthalpy of Atomization
Not Available   
565.00 kJ/mol   
11
Standard Molar Entropy
Not Available   
41.60 J/mol.K   
36
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