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Actinium Silver Comparison

Actinium
Silver
Silver Actinium comparison


Periodic Table
Symbol
Ac  
Ag  
Group Number
3  
15
11  
7
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440348  
99+
7440224  
99+
Space Group Name
Fm_ 3m  
Fm_ 3m  
Space Group Number
225.00  
3
225.00  
3
Facts
Interesting Facts
Actinium glows in the dark due to its radioactivity.  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals  
Earth's crust, Found in Minerals, Ores of metals  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
-  
Discovery
In 1902  
Before 5000 BC  
Abundance
  
  
Abundance In Universe
0.00 %  
34
0.00 %  
27
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
38
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
99+
0.00 %  
19
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
-  
Chemical Industry, Clothing Industry, Electrical Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
29
In Bone
0.00 p.p.m.  
99+
0.44 p.p.m.  
24
Physical
Melting Point
1,227.00 °C  
38
961.93 °C  
99+
Boiling Point
3,200.00 °C  
27
2,212.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
2.50  
15
Brinell Hardness
70.00 MPa  
99+
251.00 MPa  
99+
Vickers Hardness
260.00 MPa  
99+
229.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.00  
99+
0.16  
99+
Reflectivity
62.00 %  
21
97.00 %  
1
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ac  
Ag  
Isotopes
  
  
Known Isotopes
29  
10
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
1.93  
10
Sanderson Electronegativity
1.10  
38
1.83  
14
Allred Rochow Electronegativity
1.00  
37
1.42  
19
Mulliken-Jaffe Electronegativity
1.10  
99+
1.47  
28
Allen Electronegativity
1.10  
99+
1.87  
10
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
2.07  
99+
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
27
2nd Energy Level
1,170.00 kJ/mol  
99+
2,070.00 kJ/mol  
11
3rd Energy Level
1,900.00 kJ/mol  
99+
3,361.00 kJ/mol  
19
4th Energy Level
4,700.00 kJ/mol  
33
7,310.00 kJ/mol  
10
5th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
24
6th Energy Level
5,750.00 kJ/mol  
99+
7,310.00 kJ/mol  
39
7th Energy level
5,750.00 kJ/mol  
99+
7,310.00 kJ/mol  
33
8th Energy Level
5,750.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
9th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
27
10th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
32
11th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
12th Energy Level
49,900.00 kJ/mol  
21
7,310.00 kJ/mol  
99+
13th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
25
14th Energy Level
4,990.00 kJ/mol  
99+
731.00 kJ/mol  
99+
15th Energy Level
49,900.00 kJ/mol  
99+
73,100.00 kJ/mol  
22
16th Energy Level
49,900.00 kJ/mol  
99+
73,100.00 kJ/mol  
17
17th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
38
18th Energy Level
4,990.00 kJ/mol  
99+
7,310.00 kJ/mol  
28
19th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
35
20th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
29
21st Energy Level
4,990.00 kJ/mol  
25
731.00 kJ/mol  
99+
22nd Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
23
23rd Energy Level
4,990.00 kJ/mol  
29
731.00 kJ/mol  
99+
24th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
22
25th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
22
26th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
22
27th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
21
28th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
27
29th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
28
30th Energy Level
499.00 kJ/mol  
99+
731.00 kJ/mol  
22
Electrochemical Equivalent
2.82 g/amp-hr  
22
4.02 g/amp-hr  
7
Electron Work Function
4.38 eV  
23
4.26 eV  
27
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
89  
29
47  
99+
Electron Configuration
[Rn] 6d1 7s2  
[Kr] 4d10 5s1  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
FCC-Crystal-Structure-of-Silver.jpg#100  
Atom
  
  
Number of Protons
89  
29
47  
99+
Number of Neutrons
138  
17
61  
99+
Number of Electrons
89  
29
47  
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
144.00 pm  
38
Covalent Radius
186.00 pm  
21
145.00 pm  
99+
Van der Waals Radius
215.00 pm  
31
172.00 pm  
99+
Atomic Weight
227.00 amu  
25
107.87 amu  
99+
Atomic Volume
22.54 cm3/mol  
20
10.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Palladium
  
Next Element
Thorium
  
Cadmium
  
Valence Electron Potential
38.60 (-eV)  
99+
11.40 (-eV)  
99+
Lattice Constant
567.00 pm  
9
408.53 pm  
23
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.89  
2
1.59  
26
Mechanical
Density
  
  
Density At Room Temperature
10.00 g/cm3  
40
10.49 g/cm3  
37
Density When Liquid (at m.p.)
10.07 g/cm3  
40
9.32 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
170.00 MPa  
21
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
14
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
30.00 GPa  
27
Bulk Modulus
94.00 GPa  
17
100.00 GPa  
16
Young's Modulus
130.00 GPa  
16
83.00 GPa  
25
Poisson Ratio
0.34  
10
0.37  
7
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.07  
99+
10.50  
39
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
32
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
5.20 nΩ·m  
99+
15.87 nΩ·m  
99+
Electrical Conductivity
0.15 106/cm Ω  
13
0.63 106/cm Ω  
1
Electron Affinity
33.20 kJ/mol  
34
125.60 kJ/mol  
5
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.24 J/(kg K)  
25
Molar Heat Capacity
27.20 J/mol·K  
24
25.35 J/mol·K  
99+
Thermal Conductivity
12.00 W/m·K  
99+
429.00 W/m·K  
1
Critical Temperature
1,323.00 K  
99+
1,235.00 K  
99+
Thermal Expansion
12.10 µm/(m·K)  
99+
18.90 µm/(m·K)  
25
Enthalpy
  
  
Enthalpy of Vaporization
120.00 kJ/mol  
99+
255.10 kJ/mol  
99+
Enthalpy of Fusion
14.20 kJ/mol  
28
11.30 kJ/mol  
37
Enthalpy of Atomization
301.00 kJ/mol  
99+
284.50 kJ/mol  
99+
Standard Molar Entropy
56.50 J/mol.K  
33
42.60 J/mol.K  
99+
Summary >>
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