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Europium vs Cadmium

Europium
Cadmium
Cadmium vs Europium


Periodic Table
Symbol
Eu   
Cd   
Group Number
Not Available   
12   
6
Period Number
6   
5   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440531   
34
7440439   
99+
Space Group Name
Im_ 3m   
P63/mmc   
Space Group Number
229.00   
1
194.00   
5
Facts
Interesting Facts
Not Available   
  • Naturally occurring minor elements include Cadmium.
  • Cadmium is released into atmosphere to control volcanic eruption and forest fires.
  • It is used for electroplating of Steel for corrosion resistance.
  • It can absorb neutrons and used in nuclear reactor to control atomic fission.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Eugène-Anatole Demarçay   
Karl Samuel Leberecht Hermann and Friedrich Stromeyer   
Discovery
In 1896   
In 1817   
Abundance
  
  
Abundance In Universe
5 * 10-8 %   
27
2 * 10-7 %   
22
Abundance In Sun
~0.00000005 %   
27
~0.0000006 %   
21
Abundance In Meteorites
0.00 %   
99+
0.00 %   
31
Abundance In Earth's Crust
0.00 %   
36
0.00 %   
99+
Abundance In Oceans
0.00 %   
99+
0.00 %   
28
Abundance In Humans
Not Available   
0.00 %   
11
Uses
Uses & Benefits
  • Europium metals main uses is in the printing of euro banknotes. These notes glow red under UV light.
  • It is used in low energy light bulbs.
  
  • It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
  • Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
  
Industrial Uses
Chemical Industry   
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Toxic   
Present in Human Body
Yes   
Yes   
In Blood
Not Available   
0.01 Blood/mg dm-3   
24
In Bone
Not Available   
1.80 p.p.m.   
15
Physical Properties
Melting Point
822.00 °C   
99+
320.90 °C   
99+
Boiling Point
1,597.00 °C   
99+
765.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Bluish-Gray   
Luster
Lustrous   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.00   
16
Brinell Hardness
Not Available   
203.00 MPa   
39
Vickers Hardness
167.00 MPa   
34
Not Available   
Speed of Sound
Not Available   
2,310.00 m/s   
39
Optical Properties
  
  
Reflectivity
Not Available   
67.00 %   
11
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
Eu   
Cd   
Isotopes
  
  
Known Isotopes
31   
8
34   
5
Electronegativity
  
  
Pauling Electronegativity
1.20   
39
1.69   
17
Sanderson Electronegativity
1.01   
22
1.98   
9
Allred Rochow Electronegativity
Not Available   
1.46   
15
Mulliken-Jaffe Electronegativity
Not Available   
1.53   
13
Allen Electronegativity
Not Available   
1.52   
27
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.31   
37
Ionization Energies
  
  
1st Energy Level
547.10 kJ/mol   
99+
867.80 kJ/mol   
11
2nd Energy Level
1,085.00 kJ/mol   
99+
1,631.40 kJ/mol   
32
3rd Energy Level
2,404.00 kJ/mol   
99+
3,616.00 kJ/mol   
13
4th Energy Level
4,120.00 kJ/mol   
33
Not Available   
Electrochemical Equivalent
1.89 g/amp-hr   
33
2.10 g/amp-hr   
27
Electron Work Function
2.50 eV   
99+
4.22 eV   
22
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
63   
99+
48   
99+
Electron Configuration
[Xe] 4f7 6s2   
[Kr] 4d10 5s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Cadmium.jpg#100   
Atom
  
  
Number of Protons
63   
99+
48   
99+
Number of Neutrons
89   
38
64   
99+
Number of Electrons
63   
99+
48   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
151.00 pm   
32
Covalent Radius
198.00 pm   
13
144.00 pm   
40
Van der Waals Radius
233.00 pm   
18
158.00 pm   
99+
Atomic Weight
151.96 amu   
99+
112.41 amu   
99+
Atomic Volume
28.90 cm3/mol   
8
13.10 cm3/mol   
39
Adjacent Atomic Numbers
  
  
Previous Element
Samarium
  
Silver
  
Next Element
Gadolinium
  
Indium
  
Valence Electron Potential
45.60 (-eV)   
35
30.00 (-eV)   
99+
Lattice Constant
458.10 pm   
17
297.94 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.89   
1
Mechanical Properties
Density
  
  
Density At Room Temperature
5.26 g/cm3   
99+
8.65 g/cm3   
99+
Density When Liquid (at m.p.)
5.13 g/cm3   
99+
8.00 g/cm3   
28
Tensile Strength
120.00 MPa   
15
62.00 MPa   
16
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
19.40 (Pa)   
4
Not Available   
Elasticity properties
  
  
Shear Modulus
7.90 GPa   
99+
19.00 GPa   
35
Bulk Modulus
8.30 GPa   
99+
42.00 GPa   
29
Young's Modulus
18.20 GPa   
99+
50.00 GPa   
36
Poisson Ratio
0.15   
34
0.30   
14
Other Mechanical Properties
Ductile   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.24   
99+
8.65   
36
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
0.90 nΩ·m   
99+
72.70 nΩ·m   
36
Electrical Conductivity
0.01 106/cm Ω   
99+
0.14 106/cm Ω   
15
Electron Affinity
50.00 kJ/mol   
21
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
0.18 J/(kg K)   
33
0.23 J/(kg K)   
26
Molar Heat Capacity
27.66 J/mol·K   
16
26.02 J/mol·K   
32
Thermal Conductivity
13.90 W/m·K   
99+
96.60 W/m·K   
16
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
35.00 µm/(m·K)   
8
30.80 µm/(m·K)   
10
Enthalpy
  
  
Enthalpy of Vaporization
143.50 kJ/mol   
99+
100.00 kJ/mol   
99+
Enthalpy of Fusion
9.21 kJ/mol   
37
6.19 kJ/mol   
99+
Enthalpy of Atomization
180.00 kJ/mol   
99+
113.00 kJ/mol   
99+
Standard Molar Entropy
77.80 J/mol.K   
4
51.80 J/mol.K   
27
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