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Berkelium Neodymium Comparison


Neodymium Berkelium comparison


Periodic Table

Symbol
Bk   
Nd   

Group Number
Not Available   
1   
17

Period Number
7   
6   

Block
f block   
f block   

Element Family
Actinide   
Lanthanide   

CAS Number
7440406   
99+
7440008   
99+

Space Group Name
P63/mmc   
P63/mmc   

Space Group Number
194.00   
5
194.00   
5

Facts

Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • Neodymium is not found free in nature, hence it is not a native metal.
  • Neodymium metal found in minerals like Monazite and Bastnaesite.
  

Sources
Bombarding Americium with Alpha Particles.   
Found in Minerals, Mining   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Carl Auer von Welsbach   

Discovery
In 1949   
In 1885   

Abundance
  
  

Abundance In Universe
Not Available   
1 * 10-6 %   
16

Abundance In Sun
~-9999 %   
~0.0000003 %   
24

Abundance In Meteorites
Not Available   
0.00 %   
30

Abundance In Earth's Crust
Not Available   
0.00 %   
20

Abundance In Oceans
Not Available   
0.00 %   
30

Uses

Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • Neodymium-Iron-boron alloy is used to make permanent magnets.
  • It is used in microphones, Mp3 player, loudspeakers, mobile phones, etc.
  

Industrial Uses
NA   
Aerospace Industry, Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Non Toxic   

Present in Human Body
No   
No   

In Blood
0.00 Blood/mg dm-3   
37
Not Available   

In Bone
0.00 p.p.m.   
36
Not Available   

Physical Properties

Melting Point
986.00 °C   
99+
1,010.00 °C   
99+

Boiling Point
2,627.00 °C   
40
3,127.00 °C   
28

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silver   
Silvery White   

Luster
Metallic   
Metallic   

Hardness
  
  

Brinell Hardness
Not Available   
265.00 MPa   
35

Vickers Hardness
Not Available   
345.00 MPa   
27

Speed of Sound
Not Available   
2,330.00 m/s   
38

Optical Properties
  
  

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
Bk   
Nd   

Isotopes
  
  

Known Isotopes
14   
25
30   
9

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
1.14   
99+

Allred Rochow Electronegativity
1.20   
27
1.07   
32

Allen Electronegativity
2.70   
1
Not Available   

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
2.86   
13

Ionization Energies
  
  

1st Energy Level
601.00 kJ/mol   
99+
533.10 kJ/mol   
99+

2nd Energy Level
1,186.00 kJ/mol   
99+
1,040.00 kJ/mol   
99+

3rd Energy Level
2,152.00 kJ/mol   
99+
2,130.00 kJ/mol   
99+

4th Energy Level
3,434.00 kJ/mol   
99+
3,900.00 kJ/mol   
99+

Electrochemical Equivalent
3.07 g/amp-hr   
16
1.79 g/amp-hr   
37

Electron Work Function
Not Available   
3.20 eV   
34

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Corrosion, Flammable, Ionization   

Atomic Properties

Atomic Number
97   
21
60   
99+

Electron Configuration
[Rn] 5f9 7s2   
[Xe] 4f4 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Double Hexagonal Close Packed (DHCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100   
DHCP-Crystal-Structure-of-Neodymium.jpg#100   

Atom
  
  

Number of Protons
97   
21
60   
99+

Number of Neutrons
150   
11
84   
40

Number of Electrons
97   
21
60   
99+

Radius of an Atom
  
  

Atomic Radius
170.00 pm   
22
181.00 pm   
13

Covalent Radius
Not Available   
201.00 pm   
10

Van der Waals Radius
Not Available   
229.00 pm   
20

Atomic Weight
247.00 amu   
18
144.24 amu   
99+

Atomic Volume
Not Available   
20.60 cm3/mol   
18

Adjacent Atomic Numbers
  
  

Previous Element
Curium
  

Next Element
Promethium
  

Valence Electron Potential
45.50 (-eV)   
36
43.40 (-eV)   
99+

Lattice Constant
341.60 pm   
99+
365.80 pm   
30

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

Lattice C/A Ratio
Not Available   
1.61   
4

Mechanical Properties

Density
  
  

Density At Room Temperature
14.78 g/cm3   
22
7.01 g/cm3   
99+

Density When Liquid (at m.p.)
13.25 g/cm3   
11
6.89 g/cm3   
36

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
21

Vapor Pressure at 2000 K
Not Available   
101.00 (Pa)   
2

Elasticity properties
  
  

Shear Modulus
Not Available   
16.30 GPa   
38

Bulk Modulus
Not Available   
31.80 GPa   
37

Young's Modulus
Not Available   
41.40 GPa   
40

Poisson Ratio
Not Available   
0.28   
16

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
14.00   
14
7.00   
99+

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
NA   

Resistivity
Not Available   
643.00 nΩ·m   
6

Electrical Conductivity
Not Available   
0.02 106/cm Ω   
99+

Electron Affinity
Not Available   
50.00 kJ/mol   
21

Thermal Properties

Specific Heat
Not Available   
0.19 J/(kg K)   
32

Molar Heat Capacity
Not Available   
27.45 J/mol·K   
17

Thermal Conductivity
10.00 W/m·K   
99+
16.50 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
9.60 µm/(m·K)   
99+

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
273.00 kJ/mol   
34

Enthalpy of Fusion
Not Available   
7.14 kJ/mol   
99+

Enthalpy of Atomization
Not Available   
322.00 kJ/mol   
32

Standard Molar Entropy
Not Available   
71.50 J/mol.K   
13

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