Home
 Compare Metals

Fermium vs Lead

Fermium
Lead
Lead vs Fermium


Periodic Table
Symbol
Fm  
Pb  
Group Number
3  
15
14  
4
Period Number
7  
6  
Block
f block  
p block  
Element Family
Actinide  
Post-​Transition  
CAS Number
7440724  
19
7439921  
99+
Space Group Name
-  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
  • 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 Pu-239 with Neutrons  
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
-  
Discovery
In 1952  
In Middle Easterns (7000 BCE)  
Abundance
  
  
Abundance In Universe
0.00 %  
35
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 %  
9
Uses
Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  
  • 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
1,527.00 °C  
26
327.50 °C  
99+
Boiling Point
0.00 °C  
99+
1,740.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Gray  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
1.50  
19
Brinell Hardness
500.00 MPa  
28
38.00 MPa  
99+
Vickers Hardness
600.00 MPa  
28
38.00 MPa  
99+
Speed of Sound
2,500.00 m/s  
99+
1,190.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
2.02  
14
Reflectivity
59.00 %  
24
5.00 %  
39
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Fm  
Pb  
Isotopes
  
  
Known Isotopes
18  
21
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
1.30  
40
1.85  
11
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.67  
99+
Ionization Energies
  
  
1st Energy Level
627.00 kJ/mol  
99+
715.60 kJ/mol  
31
2nd Energy Level
1,225.00 kJ/mol  
99+
1,450.50 kJ/mol  
99+
3rd Energy Level
2,363.00 kJ/mol  
99+
3,081.50 kJ/mol  
23
4th Energy Level
3,792.00 kJ/mol  
99+
4,083.00 kJ/mol  
99+
5th Energy Level
6,270.00 kJ/mol  
39
6,640.00 kJ/mol  
32
6th Energy Level
6,270.00 kJ/mol  
99+
7,150.00 kJ/mol  
99+
7th Energy level
6,270.00 kJ/mol  
99+
7,156.00 kJ/mol  
36
8th Energy Level
6,270.00 kJ/mol  
99+
7,150.00 kJ/mol  
32
9th Energy Level
7,040.00 kJ/mol  
33
7,156.00 kJ/mol  
30
10th Energy Level
6,270.00 kJ/mol  
99+
7,156.00 kJ/mol  
34
11th Energy Level
6,270.00 kJ/mol  
99+
7,156.00 kJ/mol  
33
12th Energy Level
62,700.00 kJ/mol  
10
7,150.00 kJ/mol  
99+
13th Energy Level
6,270.00 kJ/mol  
38
7,150.00 kJ/mol  
28
14th Energy Level
6,270.00 kJ/mol  
27
715.60 kJ/mol  
99+
15th Energy Level
62,700.00 kJ/mol  
38
71,500.00 kJ/mol  
24
16th Energy Level
62,700.00 kJ/mol  
28
71,500.00 kJ/mol  
19
17th Energy Level
627.00 kJ/mol  
99+
715.60 kJ/mol  
40
18th Energy Level
6,270.00 kJ/mol  
40
7,150.00 kJ/mol  
30
19th Energy Level
994.80 kJ/mol  
21
715.60 kJ/mol  
37
20th Energy Level
627.00 kJ/mol  
99+
715.00 kJ/mol  
31
21st Energy Level
627.00 kJ/mol  
99+
715.60 kJ/mol  
99+
22nd Energy Level
345.00 kJ/mol  
99+
715.00 kJ/mol  
25
23rd Energy Level
6,270.00 kJ/mol  
14
715.60 kJ/mol  
99+
24th Energy Level
627.60 kJ/mol  
38
715.60 kJ/mol  
24
25th Energy Level
627.00 kJ/mol  
40
715.00 kJ/mol  
25
26th Energy Level
627.60 kJ/mol  
39
715.60 kJ/mol  
24
27th Energy Level
627.60 kJ/mol  
99+
715.60 kJ/mol  
23
28th Energy Level
627.60 kJ/mol  
99+
715.60 kJ/mol  
29
29th Energy Level
627.60 kJ/mol  
99+
715.60 kJ/mol  
30
30th Energy Level
627.60 kJ/mol  
99+
715.00 kJ/mol  
24
Electrochemical Equivalent
3.20 g/amp-hr  
15
3.87 g/amp-hr  
9
Electron Work Function
4.47 eV  
21
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes  
Atomic
Atomic Number
100  
18
82  
34
Electron Configuration
[Rn] 5f12 7s2  
[Xe] 4f14 5d10 6s2 6p2  
Crystal Structure
Not Known  
Face Centered Cubic (FCC)  
Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100  
FCC-Crystal-Structure-of-Lead.jpg#100  
Atom
  
  
Number of Protons
100  
18
82  
34
Number of Neutrons
157  
8
125  
20
Number of Electrons
100  
18
82  
34
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
16
175.00 pm  
21
Covalent Radius
180.00 pm  
23
146.00 pm  
40
Van der Waals Radius
245.00 pm  
13
202.00 pm  
34
Atomic Weight
257.00 amu  
15
207.20 amu  
30
Atomic Volume
18.00 cm3/mol  
99+
18.17 cm3/mol  
39
Adjacent Atomic Numbers
  
  
Previous Element
Einsteinium
  
Thallium
  
Next Element
Mendelevium
  
Bismuth
  
Valence Electron Potential
0.00 (-eV)  
99+
24.20 (-eV)  
99+
Lattice Constant
350.00 pm  
99+
495.08 pm  
18
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.63  
13
1.51  
99+
Mechanical
Density
  
  
Density At Room Temperature
9.70 g/cm3  
99+
11.34 g/cm3  
35
Density When Liquid (at m.p.)
9.70 g/cm3  
99+
10.66 g/cm3  
36
Tensile Strength
0.10 MPa  
99+
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
30.00 GPa  
27
5.60 GPa  
99+
Bulk Modulus
50.00 GPa  
24
46.00 GPa  
28
Young's Modulus
0.00 GPa  
99+
16.00 GPa  
99+
Poisson Ratio
0.35  
9
0.44  
3
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.70  
99+
11.35  
38
Magnetic Ordering
-  
Diamagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
30
Electrical Properties
  
  
Electrical Property
-  
Poor Conductor  
Resistivity
7.90 nΩ·m  
99+
208.00 nΩ·m  
16
Electrical Conductivity
0.00 106/cm Ω  
99+
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
0.00 W/m·K  
99+
35.30 W/m·K  
39
Critical Temperature
1,323.00 K  
99+
600.61 K  
99+
Thermal Expansion
11.00 µm/(m·K)  
99+
28.90 µm/(m·K)  
13
Enthalpy
  
  
Enthalpy of Vaporization
319.20 kJ/mol  
99+
179.40 kJ/mol  
99+
Enthalpy of Fusion
13.30 kJ/mol  
30
4.77 kJ/mol  
99+
Enthalpy of Atomization
-  
194.60 kJ/mol  
99+
Standard Molar Entropy
50.00 J/mol.K  
99+
64.80 J/mol.K  
18
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!