Lead Terbium Comparison
Periodic Table
Symbol
Pb
Tb
Group Number
14
4
Not Available
Period Number
6
6
Block
p block
f block
Element Family
Post-Transition
Lanthanide
CAS Number
7439921
99+
7440279
99+
Space Group Name
Fm_ 3m
P63/mmc
Space Group Number
225.00
2
194.00
5
Facts
Interesting Facts
- Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
- The best available source of Lead metal today is by recycling automobile batteries.
- At times Terbium metal acts same as Calcium.
- Terbium metal closely similar to Lanthanum metal.
Sources
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
History
Who Discovered
Unknown
Carl Gustaf Mosander
Discovery
In Middle Easterns (7000 BCE)
In 1842
Abundance
Abundance In Universe
1 * 10-6 %
16
5 * 10-8 %
27
Abundance In Sun
~0.000001 %
18
~0.00000001 %
29
Abundance In Meteorites
0.00 %
23
0.00 %
99+
Abundance In Earth's Crust
0.00 %
26
0.00 %
40
Abundance In Oceans
0.00 %
22
0.00 %
99+
Abundance In Humans
0.00 %
8
Not Available
Uses
Uses & Benefits
- It is also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
- Terbium salts are used in optical devices like laser devices.
- Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
Industrial Uses
Chemical Industry, Electrical Industry, Electronic Industry
Electronic Industry
Medical Uses
Surgical Instruments Manufacturing
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Low Toxic
Present in Human Body
Yes
No
In Blood
0.21 Blood/mg dm-3
11
Not Available
In Bone
30.00 p.p.m.
10
Not Available
Physical Properties
Melting Point
327.50 °C
99+
1,356.00 °C
33
Boiling Point
1,740.00 °C
99+
3,123.00 °C
29
Appearance
Physical State
Solid
Solid
Color
Gray
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
1.50
18
Not Available
Brinell Hardness
38.00 MPa
99+
677.00 MPa
17
Vickers Hardness
Not Available
863.00 MPa
13
Speed of Sound
1,190.00 m/s
99+
2,620.00 m/s
35
Optical Properties
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
Pb
Tb
Isotopes
Known Isotopes
35
4
26
13
Electronegativity
Pauling Electronegativity
1.87
13
Not Available
Sanderson Electronegativity
2.29
4
Not Available
Allred Rochow Electronegativity
1.55
11
1.10
30
Mulliken-Jaffe Electronegativity
2.41
2
Not Available
Allen Electronegativity
1.85
8
Not Available
Electropositivity
Pauling Electropositivity
1.67
99+
Not Available
Ionization Energies
1st Energy Level
715.60 kJ/mol
31
603.40 kJ/mol
99+
2nd Energy Level
1,450.50 kJ/mol
99+
1,174.80 kJ/mol
99+
3rd Energy Level
3,081.50 kJ/mol
23
2,417.00 kJ/mol
99+
4th Energy Level
4,083.00 kJ/mol
35
4,203.00 kJ/mol
31
5th Energy Level
6,640.00 kJ/mol
20
Not Available
Electrochemical Equivalent
3.87 g/amp-hr
9
1.98 g/amp-hr
31
Electron Work Function
4.25 eV
21
3.00 eV
36
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes
Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
82
34
65
99+
Electron Configuration
[Xe] 4f14 5d10 6s2 6p2
[Xe] 4f9 6s2
Crystal Structure
Face Centered Cubic (FCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
FCC-Crystal-Structure-of-Lead.jpg#100
HCP-Crystal-Structure-of-Terbium.jpg#100
Atom
Number of Protons
82
34
65
99+
Number of Neutrons
125
19
94
36
Number of Electrons
82
34
65
99+
Radius of an Atom
Atomic Radius
175.00 pm
19
177.00 pm
17
Covalent Radius
146.00 pm
38
194.00 pm
16
Van der Waals Radius
202.00 pm
27
221.00 pm
22
Atomic Weight
207.20 amu
30
158.93 amu
99+
Atomic Volume
18.17 cm3/mol
27
19.20 cm3/mol
22
Adjacent Atomic Numbers
Valence Electron Potential
24.20 (-eV)
99+
46.80 (-eV)
33
Lattice Constant
495.08 pm
16
360.10 pm
36
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.58
13
Mechanical Properties
Density
Density At Room Temperature
11.34 g/cm3
33
8.23 g/cm3
99+
Density When Liquid (at m.p.)
10.66 g/cm3
15
7.65 g/cm3
30
Tensile Strength
12.00 MPa
20
60.00 MPa
17
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
1.64 (Pa)
7
0.00 (Pa)
29
Vapor Pressure at 2000 K
Not Available
12.50 (Pa)
8
Elasticity properties
Shear Modulus
5.60 GPa
99+
22.10 GPa
32
Bulk Modulus
46.00 GPa
24
38.70 GPa
33
Young's Modulus
16.00 GPa
99+
55.70 GPa
34
Poisson Ratio
0.44
3
0.26
21
Other Mechanical Properties
Ductile, Malleable
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
11.35
25
8.23
39
Magnetic Ordering
Diamagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Conductor
Resistivity
208.00 nΩ·m
16
1.15 nΩ·m
99+
Electrical Conductivity
0.05 106/cm Ω
36
0.01 106/cm Ω
99+
Electron Affinity
35.10 kJ/mol
28
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.18 J/(kg K)
33
Molar Heat Capacity
26.65 J/mol·K
26
28.91 J/mol·K
9
Thermal Conductivity
35.30 W/m·K
38
11.10 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
28.90 µm/(m·K)
13
10.30 µm/(m·K)
38
Enthalpy
Enthalpy of Vaporization
179.40 kJ/mol
99+
330.90 kJ/mol
26
Enthalpy of Fusion
4.77 kJ/mol
99+
10.80 kJ/mol
34
Enthalpy of Atomization
194.60 kJ/mol
99+
314.00 kJ/mol
33
Standard Molar Entropy
64.80 J/mol.K
17
73.20 J/mol.K
10
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