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Americium vs Tantalum

Americium
Tantalum
Tantalum vs Americium


Periodic Table
Symbol
Am  
Ta  
Group Number
10  
8
5  
13
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440359  
99+
7440257  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  
  • 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 Bombarding Plutonium with Neutrons  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Anders Gustaf Ekeberg  
Discovery
In 1944  
In 1802  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
32
Abundance In Sun
0.00 %  
30
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 %  
31
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  
  • 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
994.00 °C  
99+
2,996.00 °C  
4
Boiling Point
2,607.00 °C  
99+
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray Blue  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
6.50  
5
Brinell Hardness
260.00 MPa  
99+
440.00 MPa  
33
Vickers Hardness
600.00 MPa  
28
870.00 MPa  
19
Speed of Sound
2,750.00 m/s  
99+
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
1.30  
99+
2.15  
10
Reflectivity
64.00 %  
19
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Am  
Ta  
Isotopes
  
  
Known Isotopes
16  
23
31  
8
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.50  
28
Sanderson Electronegativity
1.30  
25
1.50  
18
Allred Rochow Electronegativity
1.20  
28
1.33  
23
Mulliken-Jaffe Electronegativity
1.30  
33
1.50  
26
Allen Electronegativity
1.30  
40
1.34  
38
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.50  
27
Ionization Energies
  
  
1st Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
18
2nd Energy Level
1,158.00 kJ/mol  
99+
1,500.00 kJ/mol  
99+
3rd Energy Level
2,132.00 kJ/mol  
99+
761.00 kJ/mol  
99+
4th Energy Level
3,493.00 kJ/mol  
99+
7,610.00 kJ/mol  
9
5th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
6th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
36
7th Energy level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
8th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
9th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
26
10th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
30
11th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
29
12th Energy Level
62,400.00 kJ/mol  
11
7,610.00 kJ/mol  
99+
13th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
22
14th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
19
15th Energy Level
62,400.00 kJ/mol  
39
76,100.00 kJ/mol  
19
16th Energy Level
57,800.00 kJ/mol  
99+
76,100.00 kJ/mol  
14
17th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
35
18th Energy Level
5,780.00 kJ/mol  
99+
7,610.00 kJ/mol  
25
19th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
32
20th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
26
21st Energy Level
5,780.00 kJ/mol  
22
761.00 kJ/mol  
99+
22nd Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
20
23rd Energy Level
5,780.00 kJ/mol  
23
761.00 kJ/mol  
99+
24th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
16
25th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
16
26th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
16
27th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
15
28th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
21
29th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
22
30th Energy Level
578.00 kJ/mol  
99+
761.00 kJ/mol  
16
Electrochemical Equivalent
3.02 g/amp-hr  
20
1.35 g/amp-hr  
99+
Electron Work Function
4.30 eV  
25
4.25 eV  
28
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
95  
23
73  
99+
Electron Configuration
[Rn] 5f7 7s2  
[Xe] 4f14 5d3 6s2  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
95  
23
73  
99+
Number of Neutrons
148  
13
108  
29
Number of Electrons
95  
23
73  
99+
Radius of an Atom
  
  
Atomic Radius
173.00 pm  
23
146.00 pm  
37
Covalent Radius
180.00 pm  
23
170.00 pm  
27
Van der Waals Radius
244.00 pm  
14
200.00 pm  
35
Atomic Weight
243.00 amu  
20
180.95 amu  
38
Atomic Volume
17.86 cm3/mol  
99+
10.90 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Plutonium
  
Hafnium
  
Next Element
Curium
  
Tungsten
  
Valence Electron Potential
44.00 (-eV)  
99+
110.00 (-eV)  
7
Lattice Constant
346.81 pm  
99+
330.13 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
34
1.41  
99+
Mechanical
Density
  
  
Density At Room Temperature
12.00 g/cm3  
32
16.69 g/cm3  
18
Density When Liquid (at m.p.)
13.67 g/cm3  
26
15.00 g/cm3  
23
Tensile Strength
80.00 MPa  
29
180.00 MPa  
20
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
13
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
69.00 GPa  
13
Bulk Modulus
44.00 GPa  
32
200.00 GPa  
8
Young's Modulus
58.00 GPa  
36
186.00 GPa  
14
Poisson Ratio
0.30  
14
0.34  
10
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.67  
26
16.65  
20
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
27
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.69 nΩ·m  
99+
131.00 nΩ·m  
25
Electrical Conductivity
0.02 106/cm Ω  
99+
0.08 106/cm Ω  
32
Electron Affinity
63.90 kJ/mol  
18
31.00 kJ/mol  
35
Thermal
Specific Heat
0.11 J/(kg K)  
99+
0.14 J/(kg K)  
38
Molar Heat Capacity
62.70 J/mol·K  
1
25.36 J/mol·K  
99+
Thermal Conductivity
10.00 W/m·K  
99+
57.50 W/m·K  
27
Critical Temperature
1,449.00 K  
99+
3,290.00 K  
4
Thermal Expansion
13.60 µm/(m·K)  
32
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
161.00 kJ/mol  
99+
753.10 kJ/mol  
2
Enthalpy of Fusion
14.39 kJ/mol  
27
31.40 kJ/mol  
3
Enthalpy of Atomization
268.00 kJ/mol  
99+
782.00 kJ/mol  
3
Standard Molar Entropy
63.10 J/mol.K  
23
41.50 J/mol.K  
99+
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