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Actinium vs Platinum

Actinium
Platinum
Platinum vs Actinium


Periodic Table
Symbol
Ac  
Pt  
Group Number
Not Available  
10  
8
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440348  
99+
7440064  
99+
Space Group Name
Fm_ 3m  
Fm_ 3m  
Space Group Number
225.00  
2
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
Obtained by Treating Radium with Neutrons, Ores of metals  
Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
Antonio de Ulloa  
Discovery
In 1902  
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
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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
1,227.00 °C  
38
1,772.00 °C  
16
Boiling Point
3,200.00 °C  
26
3,827.00 °C  
15
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
NA  
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
Ac  
Pt  
Isotopes
  
  
Known Isotopes
29  
10
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
2.28  
3
Allred Rochow Electronegativity
1.00  
36
1.44  
17
Allen Electronegativity
Not Available  
1.72  
16
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
1.72  
99+
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
870.00 kJ/mol  
10
2nd Energy Level
1,170.00 kJ/mol  
99+
1,791.00 kJ/mol  
21
3rd Energy Level
1,900.00 kJ/mol  
99+
Not Available  
4th Energy Level
4,700.00 kJ/mol  
23
Not Available  
Electrochemical Equivalent
2.82 g/amp-hr  
18
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
89  
29
78  
38
Electron Configuration
[Rn] 6d1 7s2  
[Xe] 4f14 5d9 6s1  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
FCC-Crystal-Structure-of-Platinum.jpg#100  
Atom
  
  
Number of Protons
89  
29
78  
38
Number of Neutrons
138  
16
117  
24
Number of Electrons
89  
29
78  
38
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
7
139.00 pm  
39
Covalent Radius
Not Available  
136.00 pm  
99+
Van der Waals Radius
Not Available  
175.00 pm  
36
Atomic Weight
227.00 amu  
25
47.87 amu  
99+
Atomic Volume
22.54 cm3/mol  
11
9.09 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Iridium
  
Next Element
Thorium
  
Gold
  
Valence Electron Potential
38.60 (-eV)  
99+
392.42 (-eV)  
1
Lattice Constant
567.00 pm  
8
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
10.00 g/cm3  
37
21.45 g/cm3  
11
Density When Liquid (at m.p.)
Not Available  
19.77 g/cm3  
2
Tensile Strength
Not Available  
125.00 MPa  
14
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available  
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
NA  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.07  
28
21.45  
4
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
Not Available  
0.00 H/m  
3
Electrical Properties
  
  
Electrical Property
Unknown  
Conductor  
Resistivity
Not Available  
105.00 nΩ·m  
30
Electrical Conductivity
Not Available  
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
27.20 J/mol·K  
18
25.86 J/mol·K  
35
Thermal Conductivity
12.00 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
Not Available  
19.70 kJ/mol  
12
Enthalpy of Atomization
301.00 kJ/mol  
36
565.00 kJ/mol  
11
Standard Molar Entropy
56.50 J/mol.K  
25
41.60 J/mol.K  
36
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