Home
 Compare Metals

Technetium vs Polonium

Technetium
Polonium
Polonium vs Technetium


Periodic Table
Symbol
Tc  
Po  
Group Number
7  
11
16  
2
Period Number
5  
6  
Block
d block  
p block  
Element Family
Transition Metal  
Post-​Transition  
CAS Number
7440268  
99+
7440086  
99+
Space Group Name
P63/mmc  
Pm-3m  
Space Group Number
194.00  
7
221.00  
4
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Polonium was the first radioactive element to be discovered.
  • Polonium element and its compounds are highly radioactive.
  • Its alloy with Beryllium provides source of neutrons.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Mining, Ores of metals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Pierre Curie and Marie Curie  
Discovery
In 1937  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
0.00 %  
18
-  
Abundance In Meteorites
-  
-  
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
  • A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
  
Industrial Uses
-  
Aerospace Industry, Ammunition Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly 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
254.00 °C  
99+
Boiling Point
4,877.00 °C  
7
962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Silver  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
2.25  
16
2.50  
15
Brinell Hardness
550.00 MPa  
27
70.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
30.00 MPa  
99+
Speed of Sound
16,200.00 m/s  
1
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.90  
18
2.70  
3
Reflectivity
35.00 %  
34
50.00 %  
31
Allotropes
No  
Yes  
α Allotropes
-  
α-polonium  
β Allotropes
-  
β-polonium  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Po  
Isotopes
  
  
Known Isotopes
18  
21
29  
10
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.00  
8
Sanderson Electronegativity
1.90  
13
2.00  
10
Allred Rochow Electronegativity
1.36  
21
1.76  
3
Mulliken-Jaffe Electronegativity
1.90  
13
2.48  
1
Allen Electronegativity
1.51  
31
2.19  
2
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
812.10 kJ/mol  
14
2nd Energy Level
1,470.00 kJ/mol  
99+
1,833.20 kJ/mol  
17
3rd Energy Level
2,850.00 kJ/mol  
34
812.10 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
8,121.00 kJ/mol  
7
5th Energy Level
7,020.00 kJ/mol  
28
8,120.00 kJ/mol  
12
6th Energy Level
7,020.00 kJ/mol  
99+
8,120.00 kJ/mol  
32
7th Energy level
4,700.00 kJ/mol  
99+
8,120.00 kJ/mol  
26
8th Energy Level
4,700.00 kJ/mol  
99+
8,120.00 kJ/mol  
26
9th Energy Level
7,020.00 kJ/mol  
35
8,120.00 kJ/mol  
23
10th Energy Level
7,020.00 kJ/mol  
39
8,120.00 kJ/mol  
27
11th Energy Level
7,020.00 kJ/mol  
37
8,120.00 kJ/mol  
26
12th Energy Level
7,020.00 kJ/mol  
99+
8,120.00 kJ/mol  
99+
13th Energy Level
7,020.00 kJ/mol  
33
8,120.00 kJ/mol  
19
14th Energy Level
7,020.00 kJ/mol  
23
8,120.00 kJ/mol  
18
15th Energy Level
70,200.00 kJ/mol  
29
81,200.00 kJ/mol  
15
16th Energy Level
70,200.00 kJ/mol  
24
81,200.00 kJ/mol  
12
17th Energy Level
702.50 kJ/mol  
99+
812.10 kJ/mol  
32
18th Energy Level
7,020.00 kJ/mol  
35
8,120.00 kJ/mol  
21
19th Energy Level
702.00 kJ/mol  
99+
812.10 kJ/mol  
29
20th Energy Level
702.00 kJ/mol  
35
812.00 kJ/mol  
22
21st Energy Level
702.00 kJ/mol  
99+
812.10 kJ/mol  
40
22nd Energy Level
702.00 kJ/mol  
29
812.00 kJ/mol  
17
23rd Energy Level
702.00 kJ/mol  
99+
812.10 kJ/mol  
99+
24th Energy Level
702.50 kJ/mol  
28
812.10 kJ/mol  
13
25th Energy Level
702.00 kJ/mol  
30
812.10 kJ/mol  
11
26th Energy Level
702.00 kJ/mol  
29
812.10 kJ/mol  
11
27th Energy Level
702.00 kJ/mol  
30
812.10 kJ/mol  
10
28th Energy Level
702.00 kJ/mol  
35
812.10 kJ/mol  
16
29th Energy Level
702.00 kJ/mol  
36
812.10 kJ/mol  
15
30th Energy Level
702.00 kJ/mol  
30
812.00 kJ/mol  
11
Electrochemical Equivalent
0.52 g/amp-hr  
99+
3.90 g/amp-hr  
8
Electron Work Function
4.90 eV  
12
4.50 eV  
19
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
43  
99+
84  
32
Electron Configuration
[Kr] 4d5 5s2  
[Xe] 4f14 5d10 6s2 6p4  
Crystal Structure
Hexagonal Close Packed (HCP)  
Monoclinic (MON)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
MON-Crystal-Structure-of-Polonium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
84  
32
Number of Neutrons
55  
99+
125  
20
Number of Electrons
43  
99+
84  
32
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
168.00 pm  
25
Covalent Radius
147.00 pm  
39
140.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
197.00 pm  
36
Atomic Weight
98.00 amu  
99+
209.00 amu  
28
Atomic Volume
8.50 cm3/mol  
99+
22.23 cm3/mol  
22
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Bismuth
  
Next Element
Ruthenium
  
Francium
  
Valence Electron Potential
180.00 (-eV)  
3
9.30 (-eV)  
99+
Lattice Constant
273.50 pm  
99+
335.90 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.46  
99+
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
9.20 g/cm3  
99+
Density When Liquid (at m.p.)
11.00 g/cm3  
34
9.40 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
50.00 MPa  
38
Viscosity
0.00  
25
0.00  
26
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
24.00 GPa  
40
Bulk Modulus
100.00 GPa  
16
46.00 GPa  
28
Young's Modulus
50.00 GPa  
39
46.00 GPa  
99+
Poisson Ratio
0.38  
6
0.23  
30
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
9.32  
99+
Magnetic Ordering
Paramagnetic  
Nonmagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
15
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
0.40 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.02 106/cm Ω  
99+
Electron Affinity
53.00 kJ/mol  
23
183.30 kJ/mol  
3
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.12 J/(kg K)  
99+
Molar Heat Capacity
24.27 J/mol·K  
99+
26.40 J/mol·K  
36
Thermal Conductivity
50.60 W/m·K  
30
20.00 W/m·K  
99+
Critical Temperature
2,150.00 K  
16
527.00 K  
99+
Thermal Expansion
7.10 µm/(m·K)  
99+
23.50 µm/(m·K)  
16
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
60.30 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
13.00 kJ/mol  
32
Enthalpy of Atomization
649.00 kJ/mol  
9
134.00 kJ/mol  
99+
Standard Molar Entropy
181.10 J/mol.K  
2
41.10 J/mol.K  
99+
Periodic Table >>
<< All

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

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