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Tantalum vs Americium

Tantalum
Americium
Americium vs Tantalum


Periodic Table
Symbol
Ta  
Am  
Group Number
5  
13
10  
8
Period Number
6  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440257  
99+
7440359  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
2
194.00  
7
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.
  
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Obtained By Bombarding Plutonium with Neutrons  
History
  
  
Who Discovered
Anders Gustaf Ekeberg  
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Discovery
In 1802  
In 1944  
Abundance
  
  
Abundance In Universe
0.00 %  
32
0.00 %  
35
Abundance In Sun
0.00 %  
18
0.00 %  
30
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
37
0.00 %  
99+
Abundance In Oceans
0.00 %  
31
-  
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.
  
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  
Industrial Uses
Electrical Industry, Electronic Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Low Toxic  
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
994.00 °C  
99+
Boiling Point
5,425.00 °C  
4
2,607.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray Blue  
Silvery White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
6.50  
5
6.00  
6
Brinell Hardness
440.00 MPa  
33
260.00 MPa  
99+
Vickers Hardness
870.00 MPa  
19
600.00 MPa  
28
Speed of Sound
3,400.00 m/s  
33
2,750.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.15  
10
1.30  
99+
Reflectivity
78.00 %  
8
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ta  
Am  
Isotopes
  
  
Known Isotopes
31  
8
16  
23
Electronegativity
  
  
Pauling Electronegativity
1.50  
28
1.30  
33
Sanderson Electronegativity
1.50  
18
1.30  
25
Allred Rochow Electronegativity
1.33  
23
1.20  
28
Mulliken-Jaffe Electronegativity
1.50  
26
1.30  
33
Allen Electronegativity
1.34  
38
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.50  
27
2.70  
22
Ionization Energies
  
  
1st Energy Level
761.00 kJ/mol  
18
578.00 kJ/mol  
99+
2nd Energy Level
1,500.00 kJ/mol  
99+
1,158.00 kJ/mol  
99+
3rd Energy Level
761.00 kJ/mol  
99+
2,132.00 kJ/mol  
99+
4th Energy Level
7,610.00 kJ/mol  
9
3,493.00 kJ/mol  
99+
5th Energy Level
7,610.00 kJ/mol  
19
5,780.00 kJ/mol  
99+
6th Energy Level
7,610.00 kJ/mol  
36
5,780.00 kJ/mol  
99+
7th Energy level
7,610.00 kJ/mol  
30
5,780.00 kJ/mol  
99+
8th Energy Level
7,610.00 kJ/mol  
30
5,780.00 kJ/mol  
99+
9th Energy Level
7,610.00 kJ/mol  
26
5,780.00 kJ/mol  
99+
10th Energy Level
7,610.00 kJ/mol  
30
5,780.00 kJ/mol  
99+
11th Energy Level
7,610.00 kJ/mol  
29
5,780.00 kJ/mol  
99+
12th Energy Level
7,610.00 kJ/mol  
99+
62,400.00 kJ/mol  
11
13th Energy Level
7,610.00 kJ/mol  
22
5,780.00 kJ/mol  
99+
14th Energy Level
7,610.00 kJ/mol  
19
5,780.00 kJ/mol  
99+
15th Energy Level
76,100.00 kJ/mol  
19
62,400.00 kJ/mol  
39
16th Energy Level
76,100.00 kJ/mol  
14
57,800.00 kJ/mol  
99+
17th Energy Level
761.00 kJ/mol  
35
578.00 kJ/mol  
99+
18th Energy Level
7,610.00 kJ/mol  
25
5,780.00 kJ/mol  
99+
19th Energy Level
761.00 kJ/mol  
32
578.00 kJ/mol  
99+
20th Energy Level
761.00 kJ/mol  
26
578.00 kJ/mol  
99+
21st Energy Level
761.00 kJ/mol  
99+
5,780.00 kJ/mol  
22
22nd Energy Level
761.00 kJ/mol  
20
578.00 kJ/mol  
99+
23rd Energy Level
761.00 kJ/mol  
99+
5,780.00 kJ/mol  
23
24th Energy Level
761.00 kJ/mol  
16
578.00 kJ/mol  
99+
25th Energy Level
761.00 kJ/mol  
16
578.00 kJ/mol  
99+
26th Energy Level
761.00 kJ/mol  
16
578.00 kJ/mol  
99+
27th Energy Level
761.00 kJ/mol  
15
578.00 kJ/mol  
99+
28th Energy Level
761.00 kJ/mol  
21
578.00 kJ/mol  
99+
29th Energy Level
761.00 kJ/mol  
22
578.00 kJ/mol  
99+
30th Energy Level
761.00 kJ/mol  
16
578.00 kJ/mol  
99+
Electrochemical Equivalent
1.35 g/amp-hr  
99+
3.02 g/amp-hr  
20
Electron Work Function
4.25 eV  
28
4.30 eV  
25
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
73  
99+
95  
23
Electron Configuration
[Xe] 4f14 5d3 6s2  
[Rn] 5f7 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
DHCP-Crystal-Structure-of-Americium.jpg#100  
Atom
  
  
Number of Protons
73  
99+
95  
23
Number of Neutrons
108  
29
148  
13
Number of Electrons
73  
99+
95  
23
Radius of an Atom
  
  
Atomic Radius
146.00 pm  
37
173.00 pm  
23
Covalent Radius
170.00 pm  
27
180.00 pm  
23
Van der Waals Radius
200.00 pm  
35
244.00 pm  
14
Atomic Weight
180.95 amu  
38
243.00 amu  
20
Atomic Volume
10.90 cm3/mol  
99+
17.86 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Hafnium
  
Plutonium
  
Next Element
Tungsten
  
Curium
  
Valence Electron Potential
110.00 (-eV)  
7
44.00 (-eV)  
99+
Lattice Constant
330.13 pm  
99+
346.81 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.41  
99+
1.58  
34
Mechanical
Density
  
  
Density At Room Temperature
16.69 g/cm3  
18
12.00 g/cm3  
32
Density When Liquid (at m.p.)
15.00 g/cm3  
23
13.67 g/cm3  
26
Tensile Strength
180.00 MPa  
20
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
13
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
69.00 GPa  
13
26.00 GPa  
36
Bulk Modulus
200.00 GPa  
8
44.00 GPa  
32
Young's Modulus
186.00 GPa  
14
58.00 GPa  
36
Poisson Ratio
0.34  
10
0.30  
14
Other Mechanical Properties
Ductile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
16.65  
20
13.67  
26
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
27
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
131.00 nΩ·m  
25
0.69 nΩ·m  
99+
Electrical Conductivity
0.08 106/cm Ω  
32
0.02 106/cm Ω  
99+
Electron Affinity
31.00 kJ/mol  
35
63.90 kJ/mol  
18
Thermal
Specific Heat
0.14 J/(kg K)  
38
0.11 J/(kg K)  
99+
Molar Heat Capacity
25.36 J/mol·K  
99+
62.70 J/mol·K  
1
Thermal Conductivity
57.50 W/m·K  
27
10.00 W/m·K  
99+
Critical Temperature
3,290.00 K  
4
1,449.00 K  
99+
Thermal Expansion
6.30 µm/(m·K)  
99+
13.60 µm/(m·K)  
32
Enthalpy
  
  
Enthalpy of Vaporization
753.10 kJ/mol  
2
161.00 kJ/mol  
99+
Enthalpy of Fusion
31.40 kJ/mol  
3
14.39 kJ/mol  
27
Enthalpy of Atomization
782.00 kJ/mol  
3
268.00 kJ/mol  
99+
Standard Molar Entropy
41.50 J/mol.K  
99+
63.10 J/mol.K  
23
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