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Properties of Curium and Rhodium

Curium
Rhodium
Properties of Rhodium & Curium


Physical Properties
Melting Point
1,340.00 °C   
34
1,966.00 °C   
12
Boiling Point
3,110.00 °C   
30
3,727.00 °C   
17
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
Not Available   
980.00 MPa   
9
Vickers Hardness
Not Available   
1,100.00 MPa   
9
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
84.00 %   
4
Speed of Sound
Not Available   
4,700.00 m/s   
15
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
Cm   
Rh   
Isotopes
  
  
Known Isotopes
15   
24
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
2.28   
3
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.20   
27
1.45   
16
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
1.56   
24
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
1.72   
99+
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol   
99+
719.70 kJ/mol   
29
2nd Energy Level
1,196.00 kJ/mol   
99+
1,740.00 kJ/mol   
26
3rd Energy Level
2,026.00 kJ/mol   
99+
2,997.00 kJ/mol   
27
Electrochemical Equivalent
3.07 g/amp-hr   
16
1.28 g/amp-hr   
99+
Electron Work Function
Not Available   
4.98 eV   
6
Other Chemical Properties
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes   
?
Anti-corrosion metals have the protection on their surfaces which protect them from corroding in corrosive environments.Anti Corrosion, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes   
Mechanical Properties
Density
  
  
Density At Room Temperature
13.51 g/cm3   
25
12.41 g/cm3   
28
Density When Liquid (at m.p.)
13.85 g/cm3   
10
10.70 g/cm3   
14
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
Not Available   
0.02 (Pa)   
19
Tensile Strength
Not Available   
951.00 MPa   
5
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
Not Available   
150.00 GPa   
6
Bulk Modulus
Not Available   
275.00 GPa   
5
Young's Modulus
Not Available   
380.00 GPa   
5
Poisson Ratio
Not Available   
0.26   
22
Other Mechanical Properties
Unknown   
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable   
Periodic Table
Symbol
Cm   
Rh   
Group Number
Not Available   
9   
9
Period Number
7   
5   
Block
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
?
The d-block is on the middle of the periodic table and includes elements from columns 3 through 12. These elements are also known as the transition metals because they show a transitivity in their properties i.e. they show a trend in their properties.d block   
Element Family
?
Total 15 metals are included in actinide series, from Actinium to Lawrencium. Actinide series is located under f and d block of the periodic table.Actinide   
?
What is Transition Metal? All transition metals are placed under the d-block from group number 3 to 12. Transition metals show characteristics like malleability, ductility and are good conductor of electricity.Transition Metal   
Atomic Properties
Atomic Number
96   
22
45   
99+
Atomic Weight
247.00 amu   
18
102.91 amu   
99+
Atomic Volume
18.28 cm3/mol   
26
8.30 cm3/mol   
99+
Electron Configuration
[Rn] 5f7 6d1 7s2   
[Kr] 4d8 5s1   
Valence Electron Potential
44.50 (-eV)   
38
64.00 (-eV)   
22
Atom
  
  
Number of Protons
96   
22
45   
99+
Number of Neutrons
151   
10
58   
99+
Number of Electrons
96   
22
45   
99+
Crystal Structure
?
In crystallography, the hexagonal crystal structure and its double hexagonal crystal structure is one of the 7 crystal structure, The hexagonal lattice system consists of just one Bravais lattice type: the hexagonal shape.Double Hexagonal Close Packed (DHCP)   
?
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.Face Centered Cubic (FCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100   
FCC-Crystal-Structure-of-Rhodium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
174.00 pm   
20
134.00 pm   
99+
Covalent Radius
169.00 pm   
26
142.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Lattice Constant
Not Available   
380.34 pm   
27
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Berkelium
  
Palladium
  
Previous Element
Americium
  
Ruthenium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
1.25 nΩ·m   
99+
43.30 nΩ·m   
99+
Electrical Conductivity
Not Available   
0.21 106/cm Ω   
8
Electron Affinity
Not Available   
109.70 kJ/mol   
7
Electrical Property
Unknown   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
13.51   
17
12.41   
20
Magnetic Ordering
?
Antiferromagnetic metals denote or exhibit a form of magnetism characterized by an anti-parallel alignment of adjacent electron spins in a crystal lattice.Antiferromagnetic   
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
Not Available   
0.24 J/(kg K)   
22
Thermal Conductivity
Not Available   
150.00 W/m·K   
9
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
Not Available   
24.98 J/mol·K   
99+
Thermal Expansion
Not Available   
8.20 µm/(m·K)   
99+
Standard Molar Entropy
Not Available   
31.50 J/mol.K   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
495.40 kJ/mol   
12
Enthalpy of Fusion
15.00 kJ/mol   
21
21.76 kJ/mol   
10
Enthalpy of Atomization
Not Available   
556.50 kJ/mol   
12
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