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Silver Americium Comparison

Silver
Americium
Americium Silver comparison


Periodic Table
Symbol
Ag  
Am  
Group Number
11  
7
10  
8
Period Number
5  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440224  
99+
7440359  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
3
194.00  
7
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.
  
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  
Sources
Earth's crust, Found in Minerals, Ores of metals  
Obtained By Bombarding Plutonium with Neutrons  
History
  
  
Who Discovered
-  
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Discovery
Before 5000 BC  
In 1944  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
35
Abundance In Sun
0.00 %  
26
0.00 %  
30
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
-  
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.
  
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  
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+
994.00 °C  
99+
Boiling Point
2,212.00 °C  
99+
2,607.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
2.50  
15
6.00  
6
Brinell Hardness
251.00 MPa  
99+
260.00 MPa  
99+
Vickers Hardness
229.00 MPa  
99+
600.00 MPa  
28
Speed of Sound
2,680.00 m/s  
99+
2,750.00 m/s  
99+
Optical Properties
  
  
Refractive Index
0.16  
99+
1.30  
99+
Reflectivity
97.00 %  
1
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ag  
Am  
Isotopes
  
  
Known Isotopes
36  
3
16  
23
Electronegativity
  
  
Pauling Electronegativity
1.93  
10
1.30  
33
Sanderson Electronegativity
1.83  
14
1.30  
25
Allred Rochow Electronegativity
1.42  
19
1.20  
28
Mulliken-Jaffe Electronegativity
1.47  
28
1.30  
33
Allen Electronegativity
1.87  
10
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.07  
99+
2.70  
22
Ionization Energies
  
  
1st Energy Level
731.00 kJ/mol  
27
578.00 kJ/mol  
99+
2nd Energy Level
2,070.00 kJ/mol  
11
1,158.00 kJ/mol  
99+
3rd Energy Level
3,361.00 kJ/mol  
19
2,132.00 kJ/mol  
99+
4th Energy Level
7,310.00 kJ/mol  
10
3,493.00 kJ/mol  
99+
5th Energy Level
7,310.00 kJ/mol  
24
5,780.00 kJ/mol  
99+
6th Energy Level
7,310.00 kJ/mol  
39
5,780.00 kJ/mol  
99+
7th Energy level
7,310.00 kJ/mol  
33
5,780.00 kJ/mol  
99+
8th Energy Level
7,310.00 kJ/mol  
31
5,780.00 kJ/mol  
99+
9th Energy Level
7,310.00 kJ/mol  
27
5,780.00 kJ/mol  
99+
10th Energy Level
7,310.00 kJ/mol  
32
5,780.00 kJ/mol  
99+
11th Energy Level
7,310.00 kJ/mol  
31
5,780.00 kJ/mol  
99+
12th Energy Level
7,310.00 kJ/mol  
99+
62,400.00 kJ/mol  
11
13th Energy Level
7,310.00 kJ/mol  
25
5,780.00 kJ/mol  
99+
14th Energy Level
731.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
15th Energy Level
73,100.00 kJ/mol  
22
62,400.00 kJ/mol  
39
16th Energy Level
73,100.00 kJ/mol  
17
57,800.00 kJ/mol  
99+
17th Energy Level
731.00 kJ/mol  
38
578.00 kJ/mol  
99+
18th Energy Level
7,310.00 kJ/mol  
28
5,780.00 kJ/mol  
99+
19th Energy Level
731.00 kJ/mol  
35
578.00 kJ/mol  
99+
20th Energy Level
731.00 kJ/mol  
29
578.00 kJ/mol  
99+
21st Energy Level
731.00 kJ/mol  
99+
5,780.00 kJ/mol  
22
22nd Energy Level
731.00 kJ/mol  
23
578.00 kJ/mol  
99+
23rd Energy Level
731.00 kJ/mol  
99+
5,780.00 kJ/mol  
23
24th Energy Level
731.00 kJ/mol  
22
578.00 kJ/mol  
99+
25th Energy Level
731.00 kJ/mol  
22
578.00 kJ/mol  
99+
26th Energy Level
731.00 kJ/mol  
22
578.00 kJ/mol  
99+
27th Energy Level
731.00 kJ/mol  
21
578.00 kJ/mol  
99+
28th Energy Level
731.00 kJ/mol  
27
578.00 kJ/mol  
99+
29th Energy Level
731.00 kJ/mol  
28
578.00 kJ/mol  
99+
30th Energy Level
731.00 kJ/mol  
22
578.00 kJ/mol  
99+
Electrochemical Equivalent
4.02 g/amp-hr  
7
3.02 g/amp-hr  
20
Electron Work Function
4.26 eV  
27
4.30 eV  
25
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
47  
99+
95  
23
Electron Configuration
[Kr] 4d10 5s1  
[Rn] 5f7 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100  
DHCP-Crystal-Structure-of-Americium.jpg#100  
Atom
  
  
Number of Protons
47  
99+
95  
23
Number of Neutrons
61  
99+
148  
13
Number of Electrons
47  
99+
95  
23
Radius of an Atom
  
  
Atomic Radius
144.00 pm  
38
173.00 pm  
23
Covalent Radius
145.00 pm  
99+
180.00 pm  
23
Van der Waals Radius
172.00 pm  
99+
244.00 pm  
14
Atomic Weight
107.87 amu  
99+
243.00 amu  
20
Atomic Volume
10.30 cm3/mol  
99+
17.86 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Palladium
  
Plutonium
  
Next Element
Cadmium
  
Curium
  
Valence Electron Potential
11.40 (-eV)  
99+
44.00 (-eV)  
99+
Lattice Constant
408.53 pm  
23
346.81 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.59  
26
1.58  
34
Mechanical
Density
  
  
Density At Room Temperature
10.49 g/cm3  
37
12.00 g/cm3  
32
Density When Liquid (at m.p.)
9.32 g/cm3  
99+
13.67 g/cm3  
26
Tensile Strength
170.00 MPa  
21
80.00 MPa  
29
Viscosity
0.00  
23
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
14
0.00 (Pa)  
13
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
26.00 GPa  
36
Bulk Modulus
100.00 GPa  
16
44.00 GPa  
32
Young's Modulus
83.00 GPa  
25
58.00 GPa  
36
Poisson Ratio
0.37  
7
0.30  
14
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.50  
39
13.67  
26
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
32
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
15.87 nΩ·m  
99+
0.69 nΩ·m  
99+
Electrical Conductivity
0.63 106/cm Ω  
1
0.02 106/cm Ω  
99+
Electron Affinity
125.60 kJ/mol  
5
63.90 kJ/mol  
18
Thermal
Specific Heat
0.24 J/(kg K)  
25
0.11 J/(kg K)  
99+
Molar Heat Capacity
25.35 J/mol·K  
99+
62.70 J/mol·K  
1
Thermal Conductivity
429.00 W/m·K  
1
10.00 W/m·K  
99+
Critical Temperature
1,235.00 K  
99+
1,449.00 K  
99+
Thermal Expansion
18.90 µm/(m·K)  
25
13.60 µm/(m·K)  
32
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol  
99+
161.00 kJ/mol  
99+
Enthalpy of Fusion
11.30 kJ/mol  
37
14.39 kJ/mol  
27
Enthalpy of Atomization
284.50 kJ/mol  
99+
268.00 kJ/mol  
99+
Standard Molar Entropy
42.60 J/mol.K  
99+
63.10 J/mol.K  
23
Summary >>
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