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Technetium vs Bohrium

Technetium
Bohrium
Bohrium vs Technetium


Periodic Table
Symbol
Tc  
Bh  
Group Number
7  
11
7  
11
Period Number
5  
7  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440268  
99+
54037148  
12
Space Group Name
P63/mmc  
-  
Space Group Number
194.00  
7
276.00  
1
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Gesellschaft für Schwerionenforschung  
Discovery
In 1937  
In 1981  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
37
Abundance In Sun
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
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
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
2,200.00 °C  
9
-  
Boiling Point
4,877.00 °C  
7
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
-  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
2.25  
16
7.00  
3
Brinell Hardness
550.00 MPa  
27
270.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
2,700.00 MPa  
4
Speed of Sound
16,200.00 m/s  
1
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.90  
18
1.50  
36
Reflectivity
35.00 %  
34
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Bh  
Isotopes
  
  
Known Isotopes
18  
21
5  
32
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.00  
8
Sanderson Electronegativity
1.90  
13
1.30  
25
Allred Rochow Electronegativity
1.36  
21
1.30  
25
Mulliken-Jaffe Electronegativity
1.90  
13
1.30  
33
Allen Electronegativity
1.51  
31
2.00  
6
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
742.90 kJ/mol  
23
2nd Energy Level
1,470.00 kJ/mol  
99+
1,688.50 kJ/mol  
31
3rd Energy Level
2,850.00 kJ/mol  
34
2,566.50 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
3,598.90 kJ/mol  
99+
5th Energy Level
7,020.00 kJ/mol  
28
4,727.80 kJ/mol  
99+
6th Energy Level
7,020.00 kJ/mol  
99+
5,991.70 kJ/mol  
99+
7th Energy level
4,700.00 kJ/mol  
99+
7,226.80 kJ/mol  
34
8th Energy Level
4,700.00 kJ/mol  
99+
7,100.00 kJ/mol  
33
9th Energy Level
7,020.00 kJ/mol  
35
5,800.00 kJ/mol  
99+
10th Energy Level
7,020.00 kJ/mol  
39
7,100.00 kJ/mol  
35
11th Energy Level
7,020.00 kJ/mol  
37
8,200.00 kJ/mol  
25
12th Energy Level
7,020.00 kJ/mol  
99+
82,700.00 kJ/mol  
4
13th Energy Level
7,020.00 kJ/mol  
33
7,100.00 kJ/mol  
29
14th Energy Level
7,020.00 kJ/mol  
23
8,200.00 kJ/mol  
17
15th Energy Level
70,200.00 kJ/mol  
29
82,000.00 kJ/mol  
14
16th Energy Level
70,200.00 kJ/mol  
24
71,100.00 kJ/mol  
20
17th Energy Level
702.50 kJ/mol  
99+
820.00 kJ/mol  
31
18th Energy Level
7,020.00 kJ/mol  
35
8,200.00 kJ/mol  
20
19th Energy Level
702.00 kJ/mol  
99+
820.80 kJ/mol  
28
20th Energy Level
702.00 kJ/mol  
35
820.00 kJ/mol  
21
21st Energy Level
702.00 kJ/mol  
99+
8,200.00 kJ/mol  
11
22nd Energy Level
702.00 kJ/mol  
29
820.00 kJ/mol  
16
23rd Energy Level
702.00 kJ/mol  
99+
8,200.00 kJ/mol  
8
24th Energy Level
702.50 kJ/mol  
28
820.00 kJ/mol  
12
25th Energy Level
702.00 kJ/mol  
30
820.00 kJ/mol  
10
26th Energy Level
702.00 kJ/mol  
29
820.00 kJ/mol  
10
27th Energy Level
702.00 kJ/mol  
30
820.00 kJ/mol  
9
28th Energy Level
702.00 kJ/mol  
35
820.00 kJ/mol  
15
29th Energy Level
702.00 kJ/mol  
36
820.00 kJ/mol  
14
30th Energy Level
702.00 kJ/mol  
30
820.00 kJ/mol  
10
Electrochemical Equivalent
0.52 g/amp-hr  
99+
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
43  
99+
107  
11
Electron Configuration
[Kr] 4d5 5s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
43  
99+
107  
11
Number of Neutrons
55  
99+
155  
9
Number of Electrons
43  
99+
107  
11
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
128.00 pm  
99+
Covalent Radius
147.00 pm  
39
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
0.00 pm  
99+
Atomic Weight
98.00 amu  
99+
270.00 amu  
8
Atomic Volume
8.50 cm3/mol  
99+
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Seaborgium
  
Next Element
Ruthenium
  
Hassium
  
Valence Electron Potential
180.00 (-eV)  
3
27.20 (-eV)  
99+
Lattice Constant
273.50 pm  
99+
-  
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.60  
21
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
37.10 g/cm3  
3
Density When Liquid (at m.p.)
11.00 g/cm3  
34
37.10 g/cm3  
3
Tensile Strength
50.00 MPa  
38
152.00 MPa  
24
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
28.00 GPa  
32
Bulk Modulus
100.00 GPa  
16
37.00 GPa  
99+
Young's Modulus
50.00 GPa  
39
0.00 GPa  
99+
Poisson Ratio
0.38  
6
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
37.00  
5
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
200.00 nΩ·m  
18
6.50 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.00 106/cm Ω  
99+
Electron Affinity
53.00 kJ/mol  
23
-  
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.10 J/(kg K)  
99+
Molar Heat Capacity
24.27 J/mol·K  
99+
37.10 J/mol·K  
2
Thermal Conductivity
50.60 W/m·K  
30
37.00 W/m·K  
36
Critical Temperature
2,150.00 K  
16
1,323.00 K  
99+
Thermal Expansion
7.10 µm/(m·K)  
99+
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
270.50 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
-  
Enthalpy of Atomization
649.00 kJ/mol  
9
-  
Standard Molar Entropy
181.10 J/mol.K  
2
57.00 J/mol.K  
30
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