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Radium vs Tantalum

Radium
Tantalum
Tantalum vs Radium


Periodic Table
Symbol
Ra  
Ta  
Group Number
2  
16
5  
13
Period Number
7  
6  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7440144  
99+
7440257  
99+
Space Group Name
Im_ 3m  
Im_ 3m  
Space Group Number
229.00  
2
229.00  
2
Facts
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
Sources
Mining, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
-  
Anders Gustaf Ekeberg  
Discovery
In 1898  
In 1802  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
32
Abundance In Sun
0.00 %  
26
0.00 %  
18
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
37
Abundance In Oceans
0.00 %  
99+
0.00 %  
31
Abundance In Humans
0.00 %  
23
0.00 %  
24
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • 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.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
Pharmaceutical Industry  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
Highly Toxic  
Low Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
34
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.03 p.p.m.  
33
Physical
Melting Point
700.00 °C  
99+
2,996.00 °C  
4
Boiling Point
1,737.00 °C  
99+
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray Blue  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
1.00  
22
6.50  
5
Brinell Hardness
700.00 MPa  
17
440.00 MPa  
33
Vickers Hardness
140.00 MPa  
99+
870.00 MPa  
19
Speed of Sound
3,150.00 m/s  
37
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
1.00  
99+
2.15  
10
Reflectivity
83.00 %  
6
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ra  
Ta  
Isotopes
  
  
Known Isotopes
33  
6
31  
8
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
1.50  
28
Sanderson Electronegativity
0.89  
99+
1.50  
18
Allred Rochow Electronegativity
0.97  
39
1.33  
23
Mulliken-Jaffe Electronegativity
0.92  
99+
1.50  
26
Allen Electronegativity
0.89  
99+
1.34  
38
Electropositivity
  
  
Pauling Electropositivity
3.10  
5
2.50  
27
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
18
2nd Energy Level
979.00 kJ/mol  
99+
1,500.00 kJ/mol  
99+
3rd Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
99+
4th Energy Level
5,093.00 kJ/mol  
27
7,610.00 kJ/mol  
9
5th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
6th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
36
7th Energy level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
8th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
9th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
26
10th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
11th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
29
12th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
99+
13th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
22
14th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
15th Energy Level
50,900.00 kJ/mol  
99+
76,100.00 kJ/mol  
19
16th Energy Level
50,900.00 kJ/mol  
99+
76,100.00 kJ/mol  
14
17th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
35
18th Energy Level
5,090.00 kJ/mol  
99+
7,610.00 kJ/mol  
25
19th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
32
20th Energy Level
509.00 kJ/mol  
99+
761.00 kJ/mol  
26
21st Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
99+
22nd Energy Level
509.00 kJ/mol  
99+
761.00 kJ/mol  
20
23rd Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
99+
24th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
16
25th Energy Level
509.00 kJ/mol  
99+
761.00 kJ/mol  
16
26th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
16
27th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
15
28th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
21
29th Energy Level
509.30 kJ/mol  
99+
761.00 kJ/mol  
22
30th Energy Level
509.00 kJ/mol  
99+
761.00 kJ/mol  
16
Electrochemical Equivalent
4.22 g/amp-hr  
6
1.35 g/amp-hr  
99+
Electron Work Function
4.30 eV  
25
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
88  
30
73  
99+
Electron Configuration
[Rn] 7s2  
[Xe] 4f14 5d3 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
88  
30
73  
99+
Number of Neutrons
138  
17
108  
29
Number of Electrons
88  
30
73  
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
146.00 pm  
37
Covalent Radius
221.00 pm  
3
170.00 pm  
27
Van der Waals Radius
283.00 pm  
5
200.00 pm  
35
Atomic Weight
226.00 amu  
26
180.95 amu  
38
Atomic Volume
45.20 cm3/mol  
5
10.90 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Hafnium
  
Next Element
Actinium
  
Tungsten
  
Valence Electron Potential
20.10 (-eV)  
99+
110.00 (-eV)  
7
Lattice Constant
514.80 pm  
15
330.13 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
99+
1.41  
99+
Mechanical
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
16.69 g/cm3  
18
Density When Liquid (at m.p.)
5.50 g/cm3  
99+
15.00 g/cm3  
23
Tensile Strength
40.00 MPa  
99+
180.00 MPa  
20
Viscosity
0.00  
2
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
33
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
69.00 GPa  
13
Bulk Modulus
43.00 GPa  
33
200.00 GPa  
8
Young's Modulus
83.00 GPa  
25
186.00 GPa  
14
Poisson Ratio
0.31  
13
0.34  
10
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
16.65  
20
Magnetic Ordering
Nonmagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
17
Susceptibility
0.00  
18
0.00  
27
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
100.00 nΩ·m  
31
131.00 nΩ·m  
25
Electrical Conductivity
0.00 106/cm Ω  
99+
0.08 106/cm Ω  
32
Electron Affinity
0.90 kJ/mol  
99+
31.00 kJ/mol  
35
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.14 J/(kg K)  
38
Molar Heat Capacity
20.05 J/mol·K  
99+
25.36 J/mol·K  
99+
Thermal Conductivity
18.60 W/m·K  
99+
57.50 W/m·K  
27
Critical Temperature
973.00 K  
99+
3,290.00 K  
4
Thermal Expansion
8.50 µm/(m·K)  
99+
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
113.00 kJ/mol  
99+
753.10 kJ/mol  
2
Enthalpy of Fusion
8.60 kJ/mol  
99+
31.40 kJ/mol  
3
Enthalpy of Atomization
163.00 kJ/mol  
99+
782.00 kJ/mol  
3
Standard Molar Entropy
71.00 J/mol.K  
14
41.50 J/mol.K  
99+
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