Home
 Compare Metals

Tantalum vs Polonium

Tantalum
Polonium
Polonium vs Tantalum


Periodic Table
Symbol
Ta  
Po  
Group Number
5  
13
16  
2
Period Number
6  
6  
Block
d block  
p block  
Element Family
Transition Metal  
Post-​Transition  
CAS Number
7440257  
99+
7440086  
99+
Space Group Name
Im_ 3m  
Pm-3m  
Space Group Number
229.00  
2
221.00  
4
Facts
Interesting Facts
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
  • 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
Found in Minerals, Mining, Ores of Minerals  
Mining, Ores of metals  
History
  
  
Who Discovered
Anders Gustaf Ekeberg  
Pierre Curie and Marie Curie  
Discovery
In 1802  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
32
0.00 %  
40
Abundance In Sun
0.00 %  
18
-  
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
37
0.00 %  
99+
Abundance In Oceans
0.00 %  
31
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
  • Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
  
  • 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
Electrical Industry, Electronic Industry  
Aerospace Industry, Ammunition Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
0.03 p.p.m.  
33
0.00 p.p.m.  
99+
Physical
Melting Point
2,996.00 °C  
4
254.00 °C  
99+
Boiling Point
5,425.00 °C  
4
962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray Blue  
Silver  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
6.50  
5
2.50  
15
Brinell Hardness
440.00 MPa  
33
70.00 MPa  
99+
Vickers Hardness
870.00 MPa  
19
30.00 MPa  
99+
Speed of Sound
3,400.00 m/s  
33
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.15  
10
2.70  
3
Reflectivity
78.00 %  
8
50.00 %  
31
Allotropes
No  
Yes  
α Allotropes
-  
α-polonium  
β Allotropes
-  
β-polonium  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ta  
Po  
Isotopes
  
  
Known Isotopes
31  
8
29  
10
Electronegativity
  
  
Pauling Electronegativity
1.50  
28
2.00  
8
Sanderson Electronegativity
1.50  
18
2.00  
10
Allred Rochow Electronegativity
1.33  
23
1.76  
3
Mulliken-Jaffe Electronegativity
1.50  
26
2.48  
1
Allen Electronegativity
1.34  
38
2.19  
2
Electropositivity
  
  
Pauling Electropositivity
2.50  
27
2.00  
99+
Ionization Energies
  
  
1st Energy Level
761.00 kJ/mol  
18
812.10 kJ/mol  
14
2nd Energy Level
1,500.00 kJ/mol  
99+
1,833.20 kJ/mol  
17
3rd Energy Level
761.00 kJ/mol  
99+
812.10 kJ/mol  
99+
4th Energy Level
7,610.00 kJ/mol  
9
8,121.00 kJ/mol  
7
5th Energy Level
7,610.00 kJ/mol  
19
8,120.00 kJ/mol  
12
6th Energy Level
7,610.00 kJ/mol  
36
8,120.00 kJ/mol  
32
7th Energy level
7,610.00 kJ/mol  
30
8,120.00 kJ/mol  
26
8th Energy Level
7,610.00 kJ/mol  
30
8,120.00 kJ/mol  
26
9th Energy Level
7,610.00 kJ/mol  
26
8,120.00 kJ/mol  
23
10th Energy Level
7,610.00 kJ/mol  
30
8,120.00 kJ/mol  
27
11th Energy Level
7,610.00 kJ/mol  
29
8,120.00 kJ/mol  
26
12th Energy Level
7,610.00 kJ/mol  
99+
8,120.00 kJ/mol  
99+
13th Energy Level
7,610.00 kJ/mol  
22
8,120.00 kJ/mol  
19
14th Energy Level
7,610.00 kJ/mol  
19
8,120.00 kJ/mol  
18
15th Energy Level
76,100.00 kJ/mol  
19
81,200.00 kJ/mol  
15
16th Energy Level
76,100.00 kJ/mol  
14
81,200.00 kJ/mol  
12
17th Energy Level
761.00 kJ/mol  
35
812.10 kJ/mol  
32
18th Energy Level
7,610.00 kJ/mol  
25
8,120.00 kJ/mol  
21
19th Energy Level
761.00 kJ/mol  
32
812.10 kJ/mol  
29
20th Energy Level
761.00 kJ/mol  
26
812.00 kJ/mol  
22
21st Energy Level
761.00 kJ/mol  
99+
812.10 kJ/mol  
40
22nd Energy Level
761.00 kJ/mol  
20
812.00 kJ/mol  
17
23rd Energy Level
761.00 kJ/mol  
99+
812.10 kJ/mol  
99+
24th Energy Level
761.00 kJ/mol  
16
812.10 kJ/mol  
13
25th Energy Level
761.00 kJ/mol  
16
812.10 kJ/mol  
11
26th Energy Level
761.00 kJ/mol  
16
812.10 kJ/mol  
11
27th Energy Level
761.00 kJ/mol  
15
812.10 kJ/mol  
10
28th Energy Level
761.00 kJ/mol  
21
812.10 kJ/mol  
16
29th Energy Level
761.00 kJ/mol  
22
812.10 kJ/mol  
15
30th Energy Level
761.00 kJ/mol  
16
812.00 kJ/mol  
11
Electrochemical Equivalent
1.35 g/amp-hr  
99+
3.90 g/amp-hr  
8
Electron Work Function
4.25 eV  
28
4.50 eV  
19
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
73  
99+
84  
32
Electron Configuration
[Xe] 4f14 5d3 6s2  
[Xe] 4f14 5d10 6s2 6p4  
Crystal Structure
Body Centered Cubic (BCC)  
Monoclinic (MON)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
MON-Crystal-Structure-of-Polonium.jpg#100  
Atom
  
  
Number of Protons
73  
99+
84  
32
Number of Neutrons
108  
29
125  
20
Number of Electrons
73  
99+
84  
32
Radius of an Atom
  
  
Atomic Radius
146.00 pm  
37
168.00 pm  
25
Covalent Radius
170.00 pm  
27
140.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
197.00 pm  
36
Atomic Weight
180.95 amu  
38
209.00 amu  
28
Atomic Volume
10.90 cm3/mol  
99+
22.23 cm3/mol  
22
Adjacent Atomic Numbers
  
  
Previous Element
Hafnium
  
Bismuth
  
Next Element
Tungsten
  
Francium
  
Valence Electron Potential
110.00 (-eV)  
7
9.30 (-eV)  
99+
Lattice Constant
330.13 pm  
99+
335.90 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.41  
99+
1.46  
99+
Mechanical
Density
  
  
Density At Room Temperature
16.69 g/cm3  
18
9.20 g/cm3  
99+
Density When Liquid (at m.p.)
15.00 g/cm3  
23
9.40 g/cm3  
99+
Tensile Strength
180.00 MPa  
20
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
69.00 GPa  
13
24.00 GPa  
40
Bulk Modulus
200.00 GPa  
8
46.00 GPa  
28
Young's Modulus
186.00 GPa  
14
46.00 GPa  
99+
Poisson Ratio
0.34  
10
0.23  
30
Other Mechanical Properties
Ductile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
16.65  
20
9.32  
99+
Magnetic Ordering
Paramagnetic  
Nonmagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
15
Susceptibility
0.00  
27
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
131.00 nΩ·m  
25
0.40 nΩ·m  
99+
Electrical Conductivity
0.08 106/cm Ω  
32
0.02 106/cm Ω  
99+
Electron Affinity
31.00 kJ/mol  
35
183.30 kJ/mol  
3
Thermal
Specific Heat
0.14 J/(kg K)  
38
0.12 J/(kg K)  
99+
Molar Heat Capacity
25.36 J/mol·K  
99+
26.40 J/mol·K  
36
Thermal Conductivity
57.50 W/m·K  
27
20.00 W/m·K  
99+
Critical Temperature
3,290.00 K  
4
527.00 K  
99+
Thermal Expansion
6.30 µm/(m·K)  
99+
23.50 µm/(m·K)  
16
Enthalpy
  
  
Enthalpy of Vaporization
753.10 kJ/mol  
2
60.30 kJ/mol  
99+
Enthalpy of Fusion
31.40 kJ/mol  
3
13.00 kJ/mol  
32
Enthalpy of Atomization
782.00 kJ/mol  
3
134.00 kJ/mol  
99+
Standard Molar Entropy
41.50 J/mol.K  
99+
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!