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Berkelium vs Lead

Berkelium
Lead
Lead vs Berkelium


Periodic Table
Symbol
Bk  
Pb  
Group Number
14  
4
14  
4
Period Number
7  
6  
Block
f block  
p block  
Element Family
Actinide  
Post-​Transition  
CAS Number
7440406  
99+
7439921  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • 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.
  
Sources
Bombarding Americium with Alpha Particles.  
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
-  
Discovery
In 1949  
In Middle Easterns (7000 BCE)  
Abundance
  
  
Abundance In Universe
0.00 %  
36
0.00 %  
17
Abundance In Sun
0.00 %  
30
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
0.00 %  
23
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
26
Abundance In Oceans
-  
0.00 %  
22
Abundance In Humans
0.00 %  
24
0.00 %  
9
Uses
Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • 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.
  
Industrial Uses
-  
Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
Surgical Instruments Manufacturing  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.21 Blood/mg dm-3  
11
In Bone
0.00 p.p.m.  
99+
30.00 p.p.m.  
10
Physical
Melting Point
986.00 °C  
99+
327.50 °C  
99+
Boiling Point
2,627.00 °C  
99+
1,740.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
1.50  
19
Brinell Hardness
260.00 MPa  
99+
38.00 MPa  
99+
Vickers Hardness
1,070.00 MPa  
16
38.00 MPa  
99+
Speed of Sound
2,560.00 m/s  
99+
1,190.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
2.02  
14
Reflectivity
61.00 %  
22
5.00 %  
39
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Bk  
Pb  
Isotopes
  
  
Known Isotopes
14  
25
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.87  
14
Sanderson Electronegativity
1.30  
25
2.29  
4
Allred Rochow Electronegativity
1.20  
28
1.55  
12
Mulliken-Jaffe Electronegativity
1.30  
33
2.41  
2
Allen Electronegativity
2.70  
1
1.85  
11
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.67  
99+
Ionization Energies
  
  
1st Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
31
2nd Energy Level
1,186.00 kJ/mol  
99+
1,450.50 kJ/mol  
99+
3rd Energy Level
2,152.00 kJ/mol  
99+
3,081.50 kJ/mol  
23
4th Energy Level
3,434.00 kJ/mol  
99+
4,083.00 kJ/mol  
99+
5th Energy Level
6,010.00 kJ/mol  
99+
6,640.00 kJ/mol  
32
6th Energy Level
6,010.00 kJ/mol  
99+
7,150.00 kJ/mol  
99+
7th Energy level
6,010.00 kJ/mol  
99+
7,156.00 kJ/mol  
36
8th Energy Level
6,010.00 kJ/mol  
99+
7,150.00 kJ/mol  
32
9th Energy Level
6,010.00 kJ/mol  
99+
7,156.00 kJ/mol  
30
10th Energy Level
6,010.00 kJ/mol  
99+
7,156.00 kJ/mol  
34
11th Energy Level
6,010.00 kJ/mol  
99+
7,156.00 kJ/mol  
33
12th Energy Level
60,100.00 kJ/mol  
16
7,150.00 kJ/mol  
99+
13th Energy Level
6,010.00 kJ/mol  
99+
7,150.00 kJ/mol  
28
14th Energy Level
6,010.00 kJ/mol  
32
715.60 kJ/mol  
99+
15th Energy Level
60,100.00 kJ/mol  
99+
71,500.00 kJ/mol  
24
16th Energy Level
60,100.00 kJ/mol  
33
71,500.00 kJ/mol  
19
17th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
40
18th Energy Level
6,010.00 kJ/mol  
99+
7,150.00 kJ/mol  
30
19th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
37
20th Energy Level
601.00 kJ/mol  
99+
715.00 kJ/mol  
31
21st Energy Level
6,010.00 kJ/mol  
18
715.60 kJ/mol  
99+
22nd Energy Level
601.00 kJ/mol  
99+
715.00 kJ/mol  
25
23rd Energy Level
6,010.00 kJ/mol  
19
715.60 kJ/mol  
99+
24th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
24
25th Energy Level
601.00 kJ/mol  
99+
715.00 kJ/mol  
25
26th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
24
27th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
23
28th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
29
29th Energy Level
601.00 kJ/mol  
99+
715.60 kJ/mol  
30
30th Energy Level
601.00 kJ/mol  
99+
715.00 kJ/mol  
24
Electrochemical Equivalent
3.07 g/amp-hr  
19
3.87 g/amp-hr  
9
Electron Work Function
4.90 eV  
12
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes  
Atomic
Atomic Number
97  
21
82  
34
Electron Configuration
[Rn] 5f9 7s2  
[Xe] 4f14 5d10 6s2 6p2  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100  
FCC-Crystal-Structure-of-Lead.jpg#100  
Atom
  
  
Number of Protons
97  
21
82  
34
Number of Neutrons
150  
12
125  
20
Number of Electrons
97  
21
82  
34
Radius of an Atom
  
  
Atomic Radius
170.00 pm  
24
175.00 pm  
21
Covalent Radius
170.00 pm  
27
146.00 pm  
40
Van der Waals Radius
244.00 pm  
14
202.00 pm  
34
Atomic Weight
247.00 amu  
18
207.20 amu  
30
Atomic Volume
13.39 cm3/mol  
99+
18.17 cm3/mol  
39
Adjacent Atomic Numbers
  
  
Previous Element
Curium
  
Thallium
  
Next Element
Californium
  
Bismuth
  
Valence Electron Potential
45.50 (-eV)  
37
24.20 (-eV)  
99+
Lattice Constant
341.60 pm  
99+
495.08 pm  
18
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
38
1.51  
99+
Mechanical
Density
  
  
Density At Room Temperature
14.78 g/cm3  
23
11.34 g/cm3  
35
Density When Liquid (at m.p.)
13.25 g/cm3  
29
10.66 g/cm3  
36
Tensile Strength
70.00 MPa  
31
12.00 MPa  
99+
Viscosity
0.00  
25
0.00  
29
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
1.64 (Pa)  
7
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
5.60 GPa  
99+
Bulk Modulus
13.00 GPa  
99+
46.00 GPa  
28
Young's Modulus
13.00 GPa  
99+
16.00 GPa  
99+
Poisson Ratio
0.35  
9
0.44  
3
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
14.00  
25
11.35  
38
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
30
Electrical Properties
  
  
Electrical Property
Conductor  
Poor Conductor  
Resistivity
7.60 nΩ·m  
99+
208.00 nΩ·m  
16
Electrical Conductivity
0.10 106/cm Ω  
25
0.05 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
99+
35.10 kJ/mol  
33
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.00 J/mol·K  
29
26.65 J/mol·K  
34
Thermal Conductivity
10.00 W/m·K  
99+
35.30 W/m·K  
39
Critical Temperature
1,323.00 K  
99+
600.61 K  
99+
Thermal Expansion
13.25 µm/(m·K)  
36
28.90 µm/(m·K)  
13
Enthalpy
  
  
Enthalpy of Vaporization
380.00 kJ/mol  
27
179.40 kJ/mol  
99+
Enthalpy of Fusion
13.25 kJ/mol  
31
4.77 kJ/mol  
99+
Enthalpy of Atomization
601.00 kJ/mol  
11
194.60 kJ/mol  
99+
Standard Molar Entropy
52.00 J/mol.K  
37
64.80 J/mol.K  
18
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