Tantalum vs Curium
Periodic Table
Symbol
Ta
Cm
Group Number
5
13
Not Available
Period Number
6
7
Block
d block
f block
Element Family
Transition Metal
Actinide
CAS Number
7440257
99+
7440519
36
Space Group Name
Im_ 3m
Not Available
Space Group Number
229.00
1
Not Available
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.
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
Sources
Found in Minerals, Mining, Ores of Minerals
Bombarding Plutonium with Helium Ions
History
Who Discovered
Anders Gustaf Ekeberg
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Discovery
In 1802
In 1944
Abundance
Abundance In Universe
8 * 10-9 %
31
Not Available
Abundance In Meteorites
0.00 %
99+
Not Available
Abundance In Earth's Crust
0.00 %
37
Not Available
Abundance In Oceans
0.00 %
31
Not Available
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.
- Curium metal is used to provide power to electrical equipment for space missions.
Industrial Uses
Electrical Industry, Electronic Industry
NA
Medical Uses
NA
NA
Other Uses
Alloys
Research Purposes
Biological Properties
Toxicity
Low Toxic
Unknown
Present in Human Body
Yes
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
0.03 p.p.m.
28
0.00 p.p.m.
36
Physical Properties
Melting Point
2,996.00 °C
4
1,340.00 °C
34
Boiling Point
5,425.00 °C
4
3,110.00 °C
30
Appearance
Physical State
Solid
Solid
Color
Gray Blue
Silver
Luster
Metallic
Metallic
Hardness
Mohs Hardness
6.50
5
Not Available
Brinell Hardness
440.00 MPa
28
Not Available
Vickers Hardness
870.00 MPa
12
Not Available
Speed of Sound
3,400.00 m/s
22
Not Available
Optical Properties
Reflectivity
78.00 %
6
Not Available
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Ta
Cm
Isotopes
Known Isotopes
31
8
15
24
Electronegativity
Pauling Electronegativity
1.50
27
1.30
32
Allred Rochow Electronegativity
1.33
22
1.20
27
Allen Electronegativity
1.34
33
Not Available
Electropositivity
Pauling Electropositivity
2.50
27
2.70
22
Ionization Energies
1st Energy Level
761.00 kJ/mol
18
581.00 kJ/mol
99+
2nd Energy Level
1,500.00 kJ/mol
40
1,196.00 kJ/mol
99+
3rd Energy Level
Not Available
2,026.00 kJ/mol
99+
4th Energy Level
Not Available
3,550.00 kJ/mol
99+
Electrochemical Equivalent
1.35 g/amp-hr
99+
3.07 g/amp-hr
16
Electron Work Function
4.25 eV
21
Not Available
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
73
99+
96
22
Electron Configuration
[Xe] 4f14 5d3 6s2
[Rn] 5f7 6d1 7s2
Crystal Structure
Body Centered Cubic (BCC)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
DHCP-Crystal-Structure-of-Curium.jpg#100
Atom
Number of Protons
73
99+
96
22
Number of Neutrons
108
28
151
10
Number of Electrons
73
99+
96
22
Radius of an Atom
Atomic Radius
146.00 pm
35
174.00 pm
20
Covalent Radius
170.00 pm
25
169.00 pm
26
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
180.95 amu
38
247.00 amu
18
Atomic Volume
10.90 cm3/mol
99+
18.28 cm3/mol
26
Adjacent Atomic Numbers
Valence Electron Potential
110.00 (-eV)
7
44.50 (-eV)
38
Lattice Constant
330.13 pm
99+
Not Available
Lattice Angles
π/2, π/2, π/2
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
16.69 g/cm3
18
13.51 g/cm3
25
Density When Liquid (at m.p.)
15.00 g/cm3
9
13.85 g/cm3
10
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
31
Not Available
Elasticity properties
Shear Modulus
69.00 GPa
13
Not Available
Bulk Modulus
200.00 GPa
8
Not Available
Young's Modulus
186.00 GPa
13
Not Available
Poisson Ratio
0.34
10
Not Available
Other Mechanical Properties
Ductile
Unknown
Magnetic Properties
Magnetic Characteristics
Specific Gravity
16.65
11
13.51
17
Magnetic Ordering
Paramagnetic
Antiferromagnetic
Electrical Properties
Electrical Property
Conductor
Unknown
Resistivity
131.00 nΩ·m
25
1.25 nΩ·m
99+
Electrical Conductivity
0.08 106/cm Ω
27
Not Available
Electron Affinity
31.00 kJ/mol
29
Not Available
Thermal Properties
Specific Heat
0.14 J/(kg K)
37
Not Available
Molar Heat Capacity
25.36 J/mol·K
99+
Not Available
Thermal Conductivity
57.50 W/m·K
27
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.30 µm/(m·K)
99+
Not Available
Enthalpy
Enthalpy of Vaporization
753.10 kJ/mol
2
Not Available
Enthalpy of Fusion
31.40 kJ/mol
3
15.00 kJ/mol
21
Enthalpy of Atomization
782.00 kJ/mol
3
Not Available
Standard Molar Entropy
41.50 J/mol.K
37
Not Available
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