Silver Niobium Comparison
Periodic Table
Symbol
Ag
Nb
Group Number
11
7
5
13
Period Number
5
5
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440224
99+
7440031
99+
Space Group Name
Fm_ 3m
Im_ 3m
Space Group Number
225.00
2
229.00
1
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.
- Niobium metal was used to get called Columbium in past.
- Niobium metal found freely in nature (abundance).
Sources
Earth's crust, Found in Minerals, Ores of metals
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Unknown
Charles Hatchett
Discovery
Before 5000 BC
In 1801
Abundance
Abundance In Universe
6 * 10-8 %
26
2 * 10-7 %
22
Abundance In Sun
~0.0000001 %
26
~0.0000004 %
23
Abundance In Meteorites
0.00 %
38
0.00 %
35
Abundance In Earth's Crust
0.00 %
99+
0.00 %
25
Abundance In Oceans
0.00 %
19
0.00 %
34
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.
- Niobium alloys are used in jet engines and rockets and spacecraft, beams and girders for buildings and oil and gas pipelines.
- It is used superconducting magnets in particles accelerators, NMR and MRI equipment.
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry
Aerospace Industry, Ammunition Industry, Electrical Industry, Electronic Industry
Medical Uses
Dentistry, Pharmaceutical Industry
NA
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Alloys
Biological Properties
Toxicity
Non Toxic
Low Toxic
Present in Human Body
Yes
Yes
In Blood
0.00 Blood/mg dm-3
29
0.01 Blood/mg dm-3
25
In Bone
0.44 p.p.m.
20
0.07 p.p.m.
25
Physical Properties
Melting Point
961.93 °C
99+
2,468.00 °C
6
Boiling Point
2,212.00 °C
99+
2,468.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Gray
Luster
Metallic
Metallic
Hardness
Mohs Hardness
2.50
14
6.00
6
Brinell Hardness
251.00 MPa
37
735.00 MPa
14
Vickers Hardness
229.00 MPa
30
870.00 MPa
12
Speed of Sound
2,680.00 m/s
34
3,480.00 m/s
21
Optical Properties
Reflectivity
97.00 %
1
Not Available
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
Ag
Nb
Isotopes
Known Isotopes
36
3
17
22
Electronegativity
Pauling Electronegativity
1.93
9
1.60
23
Sanderson Electronegativity
1.83
11
1.42
16
Allred Rochow Electronegativity
1.42
18
1.23
25
Mulliken-Jaffe Electronegativity
1.47
15
Not Available
Allen Electronegativity
1.87
7
1.41
31
Electropositivity
Pauling Electropositivity
2.07
99+
2.40
31
Ionization Energies
1st Energy Level
731.00 kJ/mol
27
652.10 kJ/mol
99+
2nd Energy Level
2,070.00 kJ/mol
11
1,380.00 kJ/mol
99+
3rd Energy Level
3,361.00 kJ/mol
19
2,416.00 kJ/mol
99+
4th Energy Level
Not Available
3,700.00 kJ/mol
99+
5th Energy Level
Not Available
4,877.00 kJ/mol
36
6th Energy Level
Not Available
9,847.00 kJ/mol
11
7th Energy level
Not Available
12,100.00 kJ/mol
14
Electrochemical Equivalent
4.02 g/amp-hr
7
0.69 g/amp-hr
99+
Electron Work Function
4.26 eV
20
4.30 eV
18
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
47
99+
41
99+
Electron Configuration
[Kr] 4d10 5s1
[Kr] 4d4 5s1
Crystal Structure
Face Centered Cubic (FCC)
Body Centered Cubic (BCC)
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
47
99+
41
99+
Number of Neutrons
61
99+
52
99+
Number of Electrons
47
99+
41
99+
Radius of an Atom
Atomic Radius
144.00 pm
36
146.00 pm
35
Covalent Radius
145.00 pm
39
164.00 pm
28
Van der Waals Radius
172.00 pm
38
200.00 pm
28
Atomic Weight
107.87 amu
99+
92.91 amu
99+
Atomic Volume
10.30 cm3/mol
99+
10.87 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
11.40 (-eV)
99+
104.00 (-eV)
8
Lattice Constant
408.53 pm
20
330.04 pm
99+
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
10.49 g/cm3
35
8.57 g/cm3
99+
Density When Liquid (at m.p.)
9.32 g/cm3
21
Not Available
Tensile Strength
Not Available
330.00 MPa
12
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
14
Not Available
Vapor Pressure at 2000 K
Not Available
0.00 (Pa)
27
Elasticity properties
Shear Modulus
30.00 GPa
23
38.00 GPa
19
Bulk Modulus
100.00 GPa
16
170.00 GPa
10
Young's Modulus
83.00 GPa
23
105.00 GPa
20
Poisson Ratio
0.37
7
0.40
4
Other Mechanical Properties
Ductile, Malleable
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
10.50
26
8.57
37
Magnetic Ordering
Diamagnetic
Paramagnetic
Susceptibility
0.00
5
Not Available
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
15.87 nΩ·m
99+
152.00 nΩ·m
23
Electrical Conductivity
0.63 106/cm Ω
1
0.07 106/cm Ω
28
Electron Affinity
125.60 kJ/mol
5
86.10 kJ/mol
12
Thermal Properties
Specific Heat
0.24 J/(kg K)
25
0.26 J/(kg K)
20
Molar Heat Capacity
25.35 J/mol·K
99+
24.60 J/mol·K
99+
Thermal Conductivity
429.00 W/m·K
1
53.70 W/m·K
29
Critical Temperature
Not Available
Not Available
Thermal Expansion
18.90 µm/(m·K)
23
7.30 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
255.10 kJ/mol
37
696.60 kJ/mol
4
Enthalpy of Fusion
11.30 kJ/mol
31
27.20 kJ/mol
6
Enthalpy of Atomization
284.50 kJ/mol
37
745.00 kJ/mol
4
Standard Molar Entropy
42.60 J/mol.K
35
36.40 J/mol.K
99+
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