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Actinium vs Tantalum

Actinium
Tantalum
Tantalum vs Actinium


Periodic Table
Symbol
Ac  
Ta  
Group Number
3  
15
5  
13
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440348  
99+
7440257  
99+
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
Actinium glows in the dark due to its radioactivity.  
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
Anders Gustaf Ekeberg  
Discovery
In 1902  
In 1802  
Abundance
  
  
Abundance In Universe
0.00 %  
34
0.00 %  
32
Abundance In Sun
0.00 %  
26
0.00 %  
18
Abundance In Meteorites
0.00 %  
99+
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 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Low Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.03 p.p.m.  
33
Physical
Melting Point
1,227.00 °C  
38
2,996.00 °C  
4
Boiling Point
3,200.00 °C  
27
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray Blue  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
6.50  
5
Brinell Hardness
70.00 MPa  
99+
440.00 MPa  
33
Vickers Hardness
260.00 MPa  
99+
870.00 MPa  
19
Speed of Sound
3,430.00 m/s  
32
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
1.00  
99+
2.15  
10
Reflectivity
62.00 %  
21
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ac  
Ta  
Isotopes
  
  
Known Isotopes
29  
10
31  
8
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
1.50  
28
Sanderson Electronegativity
1.10  
38
1.50  
18
Allred Rochow Electronegativity
1.00  
37
1.33  
23
Mulliken-Jaffe Electronegativity
1.10  
99+
1.50  
26
Allen Electronegativity
1.10  
99+
1.34  
38
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
2.50  
27
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
18
2nd Energy Level
1,170.00 kJ/mol  
99+
1,500.00 kJ/mol  
99+
3rd Energy Level
1,900.00 kJ/mol  
99+
761.00 kJ/mol  
99+
4th Energy Level
4,700.00 kJ/mol  
33
7,610.00 kJ/mol  
9
5th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
6th Energy Level
5,750.00 kJ/mol  
99+
7,610.00 kJ/mol  
36
7th Energy level
5,750.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
8th Energy Level
5,750.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
9th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
26
10th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
11th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
29
12th Energy Level
49,900.00 kJ/mol  
21
7,610.00 kJ/mol  
99+
13th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
22
14th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
15th Energy Level
49,900.00 kJ/mol  
99+
76,100.00 kJ/mol  
19
16th Energy Level
49,900.00 kJ/mol  
99+
76,100.00 kJ/mol  
14
17th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
35
18th Energy Level
4,990.00 kJ/mol  
99+
7,610.00 kJ/mol  
25
19th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
32
20th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
26
21st Energy Level
4,990.00 kJ/mol  
25
761.00 kJ/mol  
99+
22nd Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
20
23rd Energy Level
4,990.00 kJ/mol  
29
761.00 kJ/mol  
99+
24th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
16
25th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
16
26th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
16
27th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
15
28th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
21
29th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
22
30th Energy Level
499.00 kJ/mol  
99+
761.00 kJ/mol  
16
Electrochemical Equivalent
2.82 g/amp-hr  
22
1.35 g/amp-hr  
99+
Electron Work Function
4.38 eV  
23
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
89  
29
73  
99+
Electron Configuration
[Rn] 6d1 7s2  
[Xe] 4f14 5d3 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
89  
29
73  
99+
Number of Neutrons
138  
17
108  
29
Number of Electrons
89  
29
73  
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
146.00 pm  
37
Covalent Radius
186.00 pm  
21
170.00 pm  
27
Van der Waals Radius
215.00 pm  
31
200.00 pm  
35
Atomic Weight
227.00 amu  
25
180.95 amu  
38
Atomic Volume
22.54 cm3/mol  
20
10.90 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Hafnium
  
Next Element
Thorium
  
Tungsten
  
Valence Electron Potential
38.60 (-eV)  
99+
110.00 (-eV)  
7
Lattice Constant
567.00 pm  
9
330.13 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.89  
2
1.41  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.00 g/cm3  
40
16.69 g/cm3  
18
Density When Liquid (at m.p.)
10.07 g/cm3  
40
15.00 g/cm3  
23
Tensile Strength
65.00 MPa  
33
180.00 MPa  
20
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
25.00 GPa  
38
69.00 GPa  
13
Bulk Modulus
94.00 GPa  
17
200.00 GPa  
8
Young's Modulus
130.00 GPa  
16
186.00 GPa  
14
Poisson Ratio
0.34  
10
0.34  
10
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.07  
99+
16.65  
20
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
27
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
5.20 nΩ·m  
99+
131.00 nΩ·m  
25
Electrical Conductivity
0.15 106/cm Ω  
13
0.08 106/cm Ω  
32
Electron Affinity
33.20 kJ/mol  
34
31.00 kJ/mol  
35
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.14 J/(kg K)  
38
Molar Heat Capacity
27.20 J/mol·K  
24
25.36 J/mol·K  
99+
Thermal Conductivity
12.00 W/m·K  
99+
57.50 W/m·K  
27
Critical Temperature
1,323.00 K  
99+
3,290.00 K  
4
Thermal Expansion
12.10 µm/(m·K)  
99+
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
120.00 kJ/mol  
99+
753.10 kJ/mol  
2
Enthalpy of Fusion
14.20 kJ/mol  
28
31.40 kJ/mol  
3
Enthalpy of Atomization
301.00 kJ/mol  
99+
782.00 kJ/mol  
3
Standard Molar Entropy
56.50 J/mol.K  
33
41.50 J/mol.K  
99+
Periodic Table >>
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