Symbol
Pb
  
U
  
Period Number
6
  
7
  
Block
p block
  
f block
  
Element Family
Post-Transition
  
Actinide
  
Space Group Name
Fm_ 3m
  
Cmcm
  
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.
  
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
  
Earth's crust, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Unknown
  
Not Available
  
Discovery
In Middle Easterns (7000 BCE)
  
In 1789
  
Abundance
  
  
Abundance In Sun
~0.000001 %
  
18
~0.0000001 %
  
26
Abundance In Earth's Crust
Abundance In Humans
Not Available
  
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.
  
- The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
-
Synthetic elements like transuranium are made from Uranium metal.
  
Industrial Uses
Chemical Industry, Electrical Industry, Electronic Industry
  
Ammunition Industry, Chemical Industry
  
Medical Uses
Surgical Instruments Manufacturing
  
NA
  
Other Uses
Alloys
  
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
  
Biological Properties
  
  
Toxicity
Toxic
  
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
  
Melting Point
1,132.00 °C
  
39
Boiling Point
1,740.00 °C
  
99+
3,818.00 °C
  
16
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gray
  
Silvery Gray
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
2,350.00 MPa
  
2
Vickers Hardness
Not Available
  
1,960.00 MPa
  
2
Speed of Sound
1,190.00 m/s
  
99+
3,155.00 m/s
  
25
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Pb
  
U
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
715.60 kJ/mol
  
31
597.60 kJ/mol
  
99+
2nd Energy Level
1,450.50 kJ/mol
  
99+
1,420.00 kJ/mol
  
99+
3rd Energy Level
3,081.50 kJ/mol
  
23
1,900.00 kJ/mol
  
99+
4th Energy Level
4,083.00 kJ/mol
  
35
3,145.00 kJ/mol
  
99+
5th Energy Level
6,640.00 kJ/mol
  
20
Not Available
  
Electrochemical Equivalent
3.87 g/amp-hr
  
9
1.48 g/amp-hr
  
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes
  
Ionization, Radioactive Isotopes, Radioactivity
  
Electron Configuration
[Xe] 4f14 5d10 6s2 6p2
  
[Rn] 5f3 6d1 7s2
  
Crystal Structure
Face Centered Cubic (FCC)
  
Orthorhombic (ORTH)
  
Crystal Lattice
FCC-Crystal-Structure-of-Lead.jpg#100
  
ORTH-Crystal-Structure-of-Uranium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
18.17 cm3/mol
  
27
12.59 cm3/mol
  
40
Adjacent Atomic Numbers
  
  
Valence Electron Potential
24.20 (-eV)
  
99+
170.00 (-eV)
  
4
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
11.34 g/cm3
  
33
19.10 g/cm3
  
17
Density When Liquid (at m.p.)
10.66 g/cm3
  
15
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Poor Conductor
  
Poor Conductor
  
Resistivity
208.00 nΩ·m
  
16
Electrical Conductivity
0.05 106/cm Ω
  
36
0.04 106/cm Ω
  
37
Electron Affinity
35.10 kJ/mol
  
28
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
0.12 J/(kg K)
  
40
Molar Heat Capacity
26.65 J/mol·K
  
26
27.67 J/mol·K
  
15
Thermal Conductivity
35.30 W/m·K
  
38
27.50 W/m·K
  
40
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
28.90 µm/(m·K)
  
13
13.90 µm/(m·K)
  
27
Enthalpy
  
  
Enthalpy of Vaporization
179.40 kJ/mol
  
99+
477.00 kJ/mol
  
13
Enthalpy of Fusion
4.77 kJ/mol
  
99+
15.48 kJ/mol
  
19
Enthalpy of Atomization
194.60 kJ/mol
  
99+
489.50 kJ/mol
  
14
Standard Molar Entropy
64.80 J/mol.K
  
17
50.20 J/mol.K
  
31