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Fermium vs Technetium

Fermium
Technetium
Technetium vs Fermium


Periodic Table
Symbol
Fm  
Tc  
Group Number
3  
15
7  
11
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440724  
19
7440268  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Bombarding Pu-239 with Neutrons  
Made by Bombarding Molybdenum with Deuterons  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Emilio Segrè and Carlo Perriero  
Discovery
In 1952  
In 1937  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
40
Abundance In Sun
0.00 %  
30
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
-  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,527.00 °C  
26
2,200.00 °C  
9
Boiling Point
0.00 °C  
99+
4,877.00 °C  
7
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Shiny Gray  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
6.00  
6
2.25  
16
Brinell Hardness
500.00 MPa  
28
550.00 MPa  
27
Vickers Hardness
600.00 MPa  
28
500.00 MPa  
35
Speed of Sound
2,500.00 m/s  
99+
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
1.30  
99+
1.90  
18
Reflectivity
59.00 %  
24
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Fm  
Tc  
Isotopes
  
  
Known Isotopes
18  
21
18  
21
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.90  
12
Sanderson Electronegativity
1.30  
25
1.90  
13
Allred Rochow Electronegativity
1.20  
28
1.36  
21
Mulliken-Jaffe Electronegativity
1.30  
33
1.90  
13
Allen Electronegativity
1.30  
40
1.51  
31
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.10  
99+
Ionization Energies
  
  
1st Energy Level
627.00 kJ/mol  
99+
702.00 kJ/mol  
36
2nd Energy Level
1,225.00 kJ/mol  
99+
1,470.00 kJ/mol  
99+
3rd Energy Level
2,363.00 kJ/mol  
99+
2,850.00 kJ/mol  
34
4th Energy Level
3,792.00 kJ/mol  
99+
7,020.00 kJ/mol  
14
5th Energy Level
6,270.00 kJ/mol  
39
7,020.00 kJ/mol  
28
6th Energy Level
6,270.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
7th Energy level
6,270.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
8th Energy Level
6,270.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
9th Energy Level
7,040.00 kJ/mol  
33
7,020.00 kJ/mol  
35
10th Energy Level
6,270.00 kJ/mol  
99+
7,020.00 kJ/mol  
39
11th Energy Level
6,270.00 kJ/mol  
99+
7,020.00 kJ/mol  
37
12th Energy Level
62,700.00 kJ/mol  
10
7,020.00 kJ/mol  
99+
13th Energy Level
6,270.00 kJ/mol  
38
7,020.00 kJ/mol  
33
14th Energy Level
6,270.00 kJ/mol  
27
7,020.00 kJ/mol  
23
15th Energy Level
62,700.00 kJ/mol  
38
70,200.00 kJ/mol  
29
16th Energy Level
62,700.00 kJ/mol  
28
70,200.00 kJ/mol  
24
17th Energy Level
627.00 kJ/mol  
99+
702.50 kJ/mol  
99+
18th Energy Level
6,270.00 kJ/mol  
40
7,020.00 kJ/mol  
35
19th Energy Level
994.80 kJ/mol  
21
702.00 kJ/mol  
99+
20th Energy Level
627.00 kJ/mol  
99+
702.00 kJ/mol  
35
21st Energy Level
627.00 kJ/mol  
99+
702.00 kJ/mol  
99+
22nd Energy Level
345.00 kJ/mol  
99+
702.00 kJ/mol  
29
23rd Energy Level
6,270.00 kJ/mol  
14
702.00 kJ/mol  
99+
24th Energy Level
627.60 kJ/mol  
38
702.50 kJ/mol  
28
25th Energy Level
627.00 kJ/mol  
40
702.00 kJ/mol  
30
26th Energy Level
627.60 kJ/mol  
39
702.00 kJ/mol  
29
27th Energy Level
627.60 kJ/mol  
99+
702.00 kJ/mol  
30
28th Energy Level
627.60 kJ/mol  
99+
702.00 kJ/mol  
35
29th Energy Level
627.60 kJ/mol  
99+
702.00 kJ/mol  
36
30th Energy Level
627.60 kJ/mol  
99+
702.00 kJ/mol  
30
Electrochemical Equivalent
3.20 g/amp-hr  
15
0.52 g/amp-hr  
99+
Electron Work Function
4.47 eV  
21
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
100  
18
43  
99+
Electron Configuration
[Rn] 5f12 7s2  
[Kr] 4d5 5s2  
Crystal Structure
Not Known  
Hexagonal Close Packed (HCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100  
HCP-Crystal-Structure-of-Technetium.jpg#100  
Atom
  
  
Number of Protons
100  
18
43  
99+
Number of Neutrons
157  
8
55  
99+
Number of Electrons
100  
18
43  
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
16
136.00 pm  
99+
Covalent Radius
180.00 pm  
23
147.00 pm  
39
Van der Waals Radius
245.00 pm  
13
200.00 pm  
35
Atomic Weight
257.00 amu  
15
98.00 amu  
99+
Atomic Volume
18.00 cm3/mol  
99+
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Einsteinium
  
Molybdenum
  
Next Element
Mendelevium
  
Ruthenium
  
Valence Electron Potential
0.00 (-eV)  
99+
180.00 (-eV)  
3
Lattice Constant
350.00 pm  
99+
273.50 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.63  
13
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
9.70 g/cm3  
99+
11.00 g/cm3  
36
Density When Liquid (at m.p.)
9.70 g/cm3  
99+
11.00 g/cm3  
34
Tensile Strength
0.10 MPa  
99+
50.00 MPa  
38
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
27.00 GPa  
34
Bulk Modulus
50.00 GPa  
24
100.00 GPa  
16
Young's Modulus
0.00 GPa  
99+
50.00 GPa  
39
Poisson Ratio
0.35  
9
0.38  
6
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.70  
99+
11.50  
37
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
7.90 nΩ·m  
99+
200.00 nΩ·m  
18
Electrical Conductivity
0.00 106/cm Ω  
99+
0.07 106/cm Ω  
35
Electron Affinity
0.00 kJ/mol  
99+
53.00 kJ/mol  
23
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.21 J/(kg K)  
30
Molar Heat Capacity
27.00 J/mol·K  
29
24.27 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
50.60 W/m·K  
30
Critical Temperature
1,323.00 K  
99+
2,150.00 K  
16
Thermal Expansion
11.00 µm/(m·K)  
99+
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
319.20 kJ/mol  
99+
660.00 kJ/mol  
7
Enthalpy of Fusion
13.30 kJ/mol  
30
23.01 kJ/mol  
9
Enthalpy of Atomization
-  
649.00 kJ/mol  
9
Standard Molar Entropy
50.00 J/mol.K  
99+
181.10 J/mol.K  
2
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