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Technetium vs Silver

Technetium
Silver
Silver vs Technetium


Periodic Table
Symbol
Tc   
Ag   
Group Number
7   
11
11   
7
Period Number
5   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440268   
99+
7440224   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • 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
Made by Bombarding Molybdenum with Deuterons   
Earth's crust, Found in Minerals, Ores of metals   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Unknown   
Discovery
In 1937   
Before 5000 BC   
Abundance
  
  
Abundance In Universe
Not Available   
6 * 10-8 %   
26
Abundance In Sun
~-9999 %   
~0.0000001 %   
26
Abundance In Meteorites
Not Available   
0.00 %   
38
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
19
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
NA   
Chemical Industry, Clothing Industry, Electrical Industry   
Medical Uses
NA   
Dentistry, Pharmaceutical Industry   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Low Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
29
In Bone
0.00 p.p.m.   
36
0.44 p.p.m.   
20
Physical Properties
Melting Point
2,200.00 °C   
9
961.93 °C   
99+
Boiling Point
4,877.00 °C   
7
2,212.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Shiny Gray   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.50   
14
Brinell Hardness
Not Available   
251.00 MPa   
37
Vickers Hardness
Not Available   
229.00 MPa   
30
Speed of Sound
16,200.00 m/s   
1
2,680.00 m/s   
34
Optical Properties
  
  
Reflectivity
Not Available   
97.00 %   
1
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
Tc   
Ag   
Isotopes
  
  
Known Isotopes
18   
21
36   
3
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
1.93   
9
Sanderson Electronegativity
Not Available   
1.83   
11
Allred Rochow Electronegativity
1.36   
20
1.42   
18
Mulliken-Jaffe Electronegativity
Not Available   
1.47   
15
Allen Electronegativity
1.51   
28
1.87   
7
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
2.07   
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
731.00 kJ/mol   
27
2nd Energy Level
1,470.00 kJ/mol   
99+
2,070.00 kJ/mol   
11
3rd Energy Level
2,850.00 kJ/mol   
33
3,361.00 kJ/mol   
19
Electrochemical Equivalent
0.52 g/amp-hr   
99+
4.02 g/amp-hr   
7
Electron Work Function
Not Available   
4.26 eV   
20
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
43   
99+
47   
99+
Electron Configuration
[Kr] 4d5 5s2   
[Kr] 4d10 5s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
FCC-Crystal-Structure-of-Silver.jpg#100   
Atom
  
  
Number of Protons
43   
99+
47   
99+
Number of Neutrons
55   
99+
61   
99+
Number of Electrons
43   
99+
47   
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
144.00 pm   
36
Covalent Radius
147.00 pm   
37
145.00 pm   
39
Van der Waals Radius
200.00 pm   
28
172.00 pm   
38
Atomic Weight
98.00 amu   
99+
107.87 amu   
99+
Atomic Volume
8.50 cm3/mol   
99+
10.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Palladium
  
Next Element
Ruthenium
  
Cadmium
  
Valence Electron Potential
180.00 (-eV)   
3
11.40 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
408.53 pm   
20
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.60   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
10.49 g/cm3   
35
Density When Liquid (at m.p.)
Not Available   
9.32 g/cm3   
21
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
14
Elasticity properties
  
  
Shear Modulus
Not Available   
30.00 GPa   
23
Bulk Modulus
Not Available   
100.00 GPa   
16
Young's Modulus
Not Available   
83.00 GPa   
23
Poisson Ratio
Not Available   
0.37   
7
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
10.50   
26
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Susceptibility
Not Available   
0.00   
5
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
200.00 nΩ·m   
18
15.87 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.63 106/cm Ω   
1
Electron Affinity
53.00 kJ/mol   
18
125.60 kJ/mol   
5
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.24 J/(kg K)   
25
Molar Heat Capacity
24.27 J/mol·K   
99+
25.35 J/mol·K   
99+
Thermal Conductivity
50.60 W/m·K   
30
429.00 W/m·K   
1
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
18.90 µm/(m·K)   
23
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
255.10 kJ/mol   
37
Enthalpy of Fusion
23.01 kJ/mol   
9
11.30 kJ/mol   
31
Enthalpy of Atomization
649.00 kJ/mol   
8
284.50 kJ/mol   
37
Standard Molar Entropy
181.10 J/mol.K   
2
42.60 J/mol.K   
35
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