Home
 Compare Metals

Curium vs Niobium

Curium
Niobium
Niobium vs Curium


Periodic Table
Symbol
Cm  
Nb  
Group Number
3  
15
5  
13
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440519  
36
7440031  
99+
Space Group Name
-  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • Niobium metal was used to get called Columbium in past.
  • Niobium metal found freely in nature (abundance).
  
Sources
Bombarding Plutonium with Helium Ions  
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Charles Hatchett  
Discovery
In 1944  
In 1801  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
23
Abundance In Sun
0.00 %  
30
0.00 %  
23
Abundance In Meteorites
0.00 %  
99+
0.00 %  
35
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
25
Abundance In Oceans
-  
0.00 %  
34
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Niobium alloys are used in jet engines and rockets and spacecraft, beams and girders for buildings and oil and gas pipelines.
  • It is used superconducting magnets in particles accelerators, NMR and MRI equipment.
  
Industrial Uses
-  
Aerospace Industry, Ammunition Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.01 Blood/mg dm-3  
25
In Bone
0.00 p.p.m.  
99+
0.07 p.p.m.  
30
Physical
Melting Point
1,340.00 °C  
34
2,468.00 °C  
6
Boiling Point
3,110.00 °C  
31
2,468.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.00  
17
6.00  
6
Brinell Hardness
320.00 MPa  
40
735.00 MPa  
15
Vickers Hardness
461.00 MPa  
37
870.00 MPa  
19
Speed of Sound
2,260.00 m/s  
99+
3,480.00 m/s  
31
Optical Properties
  
  
Refractive Index
1.30  
99+
2.30  
8
Reflectivity
60.00 %  
23
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Cm  
Nb  
Isotopes
  
  
Known Isotopes
15  
24
17  
22
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.60  
24
Sanderson Electronegativity
1.30  
25
1.42  
20
Allred Rochow Electronegativity
1.20  
28
1.23  
26
Mulliken-Jaffe Electronegativity
1.30  
33
1.60  
22
Allen Electronegativity
1.30  
40
1.41  
35
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.40  
31
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
99+
2nd Energy Level
1,196.00 kJ/mol  
99+
1,380.00 kJ/mol  
99+
3rd Energy Level
2,026.00 kJ/mol  
99+
2,416.00 kJ/mol  
99+
4th Energy Level
3,550.00 kJ/mol  
99+
3,700.00 kJ/mol  
99+
5th Energy Level
5,810.00 kJ/mol  
99+
4,877.00 kJ/mol  
99+
6th Energy Level
5,810.00 kJ/mol  
99+
9,847.00 kJ/mol  
17
7th Energy level
5,810.00 kJ/mol  
99+
12,100.00 kJ/mol  
14
8th Energy Level
5,810.00 kJ/mol  
99+
6,520.00 kJ/mol  
99+
9th Energy Level
6,690.00 kJ/mol  
37
5,470.00 kJ/mol  
99+
10th Energy Level
5,810.00 kJ/mol  
99+
5,470.00 kJ/mol  
99+
11th Energy Level
5,810.00 kJ/mol  
99+
6,520.00 kJ/mol  
99+
12th Energy Level
58,100.00 kJ/mol  
19
6,520.00 kJ/mol  
99+
13th Energy Level
5,810.00 kJ/mol  
99+
5,470.00 kJ/mol  
99+
14th Energy Level
5,810.00 kJ/mol  
40
691.00 kJ/mol  
99+
15th Energy Level
58,100.00 kJ/mol  
99+
65,200.00 kJ/mol  
35
16th Energy Level
58,100.00 kJ/mol  
99+
652.10 kJ/mol  
99+
17th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
99+
18th Energy Level
5,810.00 kJ/mol  
99+
6,520.00 kJ/mol  
37
19th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
99+
20th Energy Level
581.00 kJ/mol  
99+
652.00 kJ/mol  
38
21st Energy Level
5,810.00 kJ/mol  
20
652.10 kJ/mol  
99+
22nd Energy Level
581.00 kJ/mol  
99+
694.00 kJ/mol  
30
23rd Energy Level
5,810.00 kJ/mol  
20
4,490.00 kJ/mol  
30
24th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
33
25th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
35
26th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
34
27th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
35
28th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
40
29th Energy Level
581.00 kJ/mol  
99+
652.10 kJ/mol  
99+
30th Energy Level
581.00 kJ/mol  
99+
652.00 kJ/mol  
37
Electrochemical Equivalent
3.07 g/amp-hr  
19
0.69 g/amp-hr  
99+
Electron Work Function
4.50 eV  
19
4.30 eV  
25
Other Chemical Properties
Ionization, Radioactive Isotopes  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
96  
22
41  
99+
Electron Configuration
[Rn] 5f7 6d1 7s2  
[Kr] 4d4 5s1  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
96  
22
41  
99+
Number of Neutrons
151  
11
52  
99+
Number of Electrons
96  
22
41  
99+
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
22
146.00 pm  
37
Covalent Radius
169.00 pm  
28
164.00 pm  
30
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
247.00 amu  
18
92.91 amu  
99+
Atomic Volume
18.28 cm3/mol  
38
10.87 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Zirconium
  
Next Element
Berkelium
  
Molybdenum
  
Valence Electron Potential
44.50 (-eV)  
39
104.00 (-eV)  
8
Lattice Constant
336.25 pm  
99+
330.04 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.67  
11
1.47  
99+
Mechanical
Density
  
  
Density At Room Temperature
13.51 g/cm3  
26
8.57 g/cm3  
99+
Density When Liquid (at m.p.)
13.85 g/cm3  
25
8.57 g/cm3  
99+
Tensile Strength
350.00 MPa  
12
330.00 MPa  
14
Viscosity
0.00  
25
0.00  
22
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
36
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
38.00 GPa  
20
Bulk Modulus
40.00 GPa  
38
170.00 GPa  
10
Young's Modulus
0.00 GPa  
99+
105.00 GPa  
22
Poisson Ratio
0.35  
9
0.40  
4
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.51  
28
8.57  
99+
Magnetic Ordering
Antiferromagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
4
Susceptibility
0.00  
24
0.00  
30
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
1.25 nΩ·m  
99+
152.00 nΩ·m  
23
Electrical Conductivity
0.13 106/cm Ω  
19
0.07 106/cm Ω  
33
Electron Affinity
0.00 kJ/mol  
99+
86.10 kJ/mol  
14
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.26 J/(kg K)  
20
Molar Heat Capacity
27.50 J/mol·K  
21
24.60 J/mol·K  
99+
Thermal Conductivity
11.00 W/m·K  
99+
53.70 W/m·K  
29
Critical Temperature
1,340.00 K  
99+
2,750.00 K  
7
Thermal Expansion
11.60 µm/(m·K)  
99+
7.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
331.60 kJ/mol  
40
696.60 kJ/mol  
5
Enthalpy of Fusion
15.00 kJ/mol  
22
27.20 kJ/mol  
6
Enthalpy of Atomization
-  
745.00 kJ/mol  
4
Standard Molar Entropy
52.50 J/mol.K  
36
36.40 J/mol.K  
99+
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!