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Properties of Curium and Americium


Properties of Americium & Curium


Physical Properties

Melting Point
1,340.00 °C   
34
994.00 °C   
99+

Boiling Point
3,110.00 °C   
30
2,607.00 °C   
99+

Hardness
  
  

Mohs Hardness
Not Available   
Not Available   

Brinell Hardness
Not Available   
Not Available   

Vickers Hardness
Not Available   
Not Available   

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
Not Available   
Not Available   

Speed of Sound
Not Available   
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
Cm   
Am   

Isotopes
  
  

Known Isotopes
15   
24
16   
23

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
1.30   
32

Sanderson Electronegativity
Not Available   
Not Available   

Allred Rochow Electronegativity
1.20   
27
1.20   
27

Mulliken-Jaffe Electronegativity
Not Available   
Not Available   

Allen Electronegativity
Not Available   
Not Available   

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
2.70   
22

Ionization Energies
  
  

1st Energy Level
581.00 kJ/mol   
99+
578.00 kJ/mol   
99+

2nd Energy Level
1,196.00 kJ/mol   
99+
1,158.00 kJ/mol   
99+

3rd Energy Level
2,026.00 kJ/mol   
99+
2,132.00 kJ/mol   
99+

Electrochemical Equivalent
3.07 g/amp-hr   
16
3.02 g/amp-hr   
17

Electron Work Function
Not Available   
Not Available   

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
  
?
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, 
?
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.Radioactivity, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility
  

Mechanical Properties

Density
  
  

Density At Room Temperature
13.51 g/cm3   
25
12.00 g/cm3   
30

Density When Liquid (at m.p.)
13.85 g/cm3   
10
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
13

Vapor Pressure at 2000 K
Not Available   
Not Available   

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Elasticity properties
  
  

Shear Modulus
Not Available   
Not Available   

Bulk Modulus
Not Available   
Not Available   

Young's Modulus
Not Available   
Not Available   

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
Unknown   
NA   

Periodic Table

Symbol
Cm   
Am   

Group Number
Not Available   
Not Available   

Period Number
7   
7   

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 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
  

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
  
?
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
  

Atomic Properties

Atomic Number
96   
22
95   
23

Atomic Weight
247.00 amu   
18
243.00 amu   
20

Atomic Volume
18.28 cm3/mol   
26
17.86 cm3/mol   
29

Electron Configuration
[Rn] 5f7 6d1 7s2   
[Rn] 5f7 7s2   

Valence Electron Potential
44.50 (-eV)   
38
44.00 (-eV)   
40

Atom
  
  

Number of Protons
96   
22
95   
23

Number of Neutrons
151   
10
148   
12

Number of Electrons
96   
22
95   
23

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 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)
  

Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100   
DHCP-Crystal-Structure-of-Americium.jpg#100   

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
173.00 pm   
21

Covalent Radius
169.00 pm   
26
180.00 pm   
21

Van der Waals Radius
200.00 pm   
28
244.00 pm   
10

Lattice Constant
Not Available   
346.81 pm   
99+

Lattice Angles
NA   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Next Element
Berkelium
  
Curium
  

Previous Element
Americium
  
Plutonium
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
1.25 nΩ·m   
99+
0.69 nΩ·m   
99+

Electrical Conductivity
Not Available   
0.02 106/cm Ω   
99+

Electron Affinity
Not Available   
Not Available   

Electrical Property
Unknown   
Unknown   

Magnetic Characteristics
  
  

Specific Gravity
13.51   
17
13.67   
15

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   
0.11 J/(kg K)   
99+

Thermal Conductivity
Not Available   
10.00 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Molar Heat Capacity
Not Available   
62.70 J/mol·K   
1

Thermal Expansion
Not Available   
Not Available   

Standard Molar Entropy
Not Available   
Not Available   

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
Not Available   

Enthalpy of Fusion
15.00 kJ/mol   
21
14.39 kJ/mol   
24

Enthalpy of Atomization
Not Available   
268.00 kJ/mol   
40

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