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Radium vs Europium


Europium vs Radium


Periodic Table

Symbol
Ra   
Eu   

Group Number
2   
16
Not Available   

Period Number
7   
6   

Block
s block   
f block   

Element Family
Alkaline Earth   
Lanthanide   

CAS Number
7440144   
99+
7440531   
34

Space Group Name
Im_ 3m   
Im_ 3m   

Space Group Number
229.00   
1
229.00   
1

Facts

Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Not Available   

Sources
Mining, Ores of metals   
Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Not Available   
Eugène-Anatole Demarçay   

Discovery
In 1898   
In 1896   

Abundance
  
  

Abundance In Universe
Not Available   
5 * 10-8 %   
27

Abundance In Sun
~-9999 %   
~0.00000005 %   
27

Abundance In Meteorites
Not Available   
0.00 %   
99+

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
36

Abundance In Oceans
0.00 %   
99+
0.00 %   
99+

Abundance In Humans
0.00 %   
20
Not Available   

Uses

Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • 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.
  

Industrial Uses
NA   
Chemical Industry   

Medical Uses
Pharmaceutical Industry   
NA   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Highly Toxic   
Non Toxic   

Present in Human Body
No   
Yes   

Physical Properties

Melting Point
700.00 °C   
99+
822.00 °C   
99+

Boiling Point
1,737.00 °C   
99+
1,597.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery White   
Silvery White   

Luster
Metallic   
Lustrous   

Hardness
  
  

Vickers Hardness
Not Available   
167.00 MPa   
34

Speed of Sound
Not Available   
Not Available   

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
Ra   
Eu   

Isotopes
  
  

Known Isotopes
33   
6
31   
8

Electronegativity
  
  

Pauling Electronegativity
0.90   
99+
1.20   
39

Sanderson Electronegativity
Not Available   
1.01   
22

Allred Rochow Electronegativity
0.97   
38
Not Available   

Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   

Allen Electronegativity
0.89   
99+
Not Available   

Electropositivity
  
  

Pauling Electropositivity
3.10   
5
Not Available   

Ionization Energies
  
  

1st Energy Level
509.30 kJ/mol   
99+
547.10 kJ/mol   
99+

2nd Energy Level
979.00 kJ/mol   
99+
1,085.00 kJ/mol   
99+

3rd Energy Level
Not Available   
2,404.00 kJ/mol   
99+

4th Energy Level
Not Available   
4,120.00 kJ/mol   
33

Electrochemical Equivalent
4.22 g/amp-hr   
6
1.89 g/amp-hr   
33

Electron Work Function
Not Available   
2.50 eV   
99+

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Solubility   

Atomic Properties

Atomic Number
88   
30
63   
99+

Electron Configuration
[Rn] 7s2   
[Xe] 4f7 6s2   

Crystal Structure
Body Centered Cubic (BCC)   
Body Centered Cubic (BCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
88   
30
63   
99+

Number of Neutrons
138   
16
89   
38

Number of Electrons
88   
30
63   
99+

Radius of an Atom
  
  

Atomic Radius
Not Available   
180.00 pm   
14

Covalent Radius
221.00 pm   
3
198.00 pm   
13

Van der Waals Radius
283.00 pm   
4
233.00 pm   
18

Atomic Weight
226.00 amu   
26
151.96 amu   
99+

Atomic Volume
45.20 cm3/mol   
4
28.90 cm3/mol   
8

Adjacent Atomic Numbers
  
  

Previous Element
Francium
  
Samarium
  

Next Element
Actinium
  
Gadolinium
  

Valence Electron Potential
20.10 (-eV)   
99+
45.60 (-eV)   
35

Lattice Constant
514.80 pm   
13
458.10 pm   
17

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

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
5.50 g/cm3   
99+
5.26 g/cm3   
99+

Density When Liquid (at m.p.)
Not Available   
5.13 g/cm3   
99+

Tensile Strength
Not Available   
120.00 MPa   
15

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
19.40 (Pa)   
4

Elasticity properties
  
  

Shear Modulus
Not Available   
7.90 GPa   
99+

Bulk Modulus
Not Available   
8.30 GPa   
99+

Young's Modulus
Not Available   
18.20 GPa   
99+

Poisson Ratio
Not Available   
0.15   
34

Other Mechanical Properties
NA   
Ductile   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
5.00   
99+
5.24   
99+

Magnetic Ordering
Nonmagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
NA   
Conductor   

Resistivity
100.00 nΩ·m   
31
0.90 nΩ·m   
99+

Electrical Conductivity
Not Available   
0.01 106/cm Ω   
99+

Electron Affinity
Not Available   
50.00 kJ/mol   
21

Thermal Properties

Specific Heat
0.12 J/(kg K)   
40
0.18 J/(kg K)   
33

Molar Heat Capacity
Not Available   
27.66 J/mol·K   
16

Thermal Conductivity
18.60 W/m·K   
99+
13.90 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
35.00 µm/(m·K)   
8

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
143.50 kJ/mol   
99+

Enthalpy of Fusion
Not Available   
9.21 kJ/mol   
37

Enthalpy of Atomization
163.00 kJ/mol   
99+
180.00 kJ/mol   
99+

Standard Molar Entropy
71.00 J/mol.K   
14
77.80 J/mol.K   
4

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