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Silver Actinium Comparison

Silver
Actinium
Actinium Silver comparison


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