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Radium vs Lanthanum


Lanthanum vs Radium


Periodic Table

Symbol
Ra   
La   

Group Number
2   
16
Not Available   

Period Number
7   
6   

Block
s block   
f block   

Element Family
Alkaline Earth   
Lanthanide   

CAS Number
7440144   
99+
7439910   
99+

Space Group Name
Im_ 3m   
P63/mmc   

Space Group Number
229.00   
1
194.00   
5

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.
  
  • Lanthanum metal is highly malleable, ductile and sectile.
  • If exposed to air Lanthanum metal oxidizes rapidly.
  

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

History
  
  

Who Discovered
Not Available   
Carl Gustaf Mosander   

Discovery
In 1898   
In 1838   

Abundance
  
  

Abundance In Universe
Not Available   
2 * 10-7 %   
22

Abundance In Sun
~-9999 %   
~0.0000002 %   
25

Abundance In Meteorites
Not Available   
0.00 %   
32

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
19

Abundance In Oceans
0.00 %   
99+
0.00 %   
29

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.
  
  • It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
  • The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
  

Industrial Uses
NA   
Electrical Industry, Electronic Industry   

Medical Uses
Pharmaceutical Industry   
NA   

Other Uses
NA   
Alloys, Mirror Manufacturing   

Biological Properties
  
  

Toxicity
Highly Toxic   
Low Toxic   

Present in Human Body
No   
Yes   

In Bone
Not Available   
0.08 p.p.m.   
24

Physical Properties

Melting Point
700.00 °C   
99+
920.00 °C   
99+

Boiling Point
1,737.00 °C   
99+
3,469.00 °C   
18

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery White   
Silvery White   

Luster
Metallic   
NA   

Hardness
  
  

Mohs Hardness
Not Available   
2.50   
14

Brinell Hardness
Not Available   
350.00 MPa   
30

Vickers Hardness
Not Available   
360.00 MPa   
26

Speed of Sound
Not Available   
2,475.00 m/s   
37

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   
La   

Isotopes
  
  

Known Isotopes
33   
6
31   
8

Electronegativity
  
  

Pauling Electronegativity
0.90   
99+
1.10   
99+

Allred Rochow Electronegativity
0.97   
38
1.08   
31

Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   

Allen Electronegativity
0.89   
99+
Not Available   

Electropositivity
  
  

Pauling Electropositivity
3.10   
5
2.90   
10

Ionization Energies
  
  

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

2nd Energy Level
979.00 kJ/mol   
99+
1,067.00 kJ/mol   
99+

3rd Energy Level
Not Available   
1,850.30 kJ/mol   
99+

4th Energy Level
Not Available   
4,819.00 kJ/mol   
22

5th Energy Level
Not Available   
5,940.00 kJ/mol   
25

Electrochemical Equivalent
4.22 g/amp-hr   
6
1.73 g/amp-hr   
99+

Electron Work Function
Not Available   
3.50 eV   
31

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

Atomic Properties

Atomic Number
88   
30
57   
99+

Electron Configuration
[Rn] 7s2   
[Xe] 5d2 6s2   

Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   

Atom
  
  

Number of Protons
88   
30
57   
99+

Number of Neutrons
138   
16
82   
99+

Number of Electrons
88   
30
57   
99+

Radius of an Atom
  
  

Atomic Radius
Not Available   
187.00 pm   
8

Covalent Radius
221.00 pm   
3
207.00 pm   
6

Van der Waals Radius
283.00 pm   
4
240.00 pm   
13

Atomic Weight
226.00 amu   
26
138.91 amu   
99+

Atomic Volume
45.20 cm3/mol   
4
20.73 cm3/mol   
16

Adjacent Atomic Numbers
  
  

Previous Element
Francium
  
Barium
  

Next Element
Actinium
  
Cerium
  

Valence Electron Potential
20.10 (-eV)   
99+
40.71 (-eV)   
99+

Lattice Constant
514.80 pm   
13
377.20 pm   
28

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

Lattice C/A Ratio
Not Available   
1.62   
2

Mechanical Properties

Density
  
  

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

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

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
Not Available   
0.98 (Pa)   
15

Elasticity properties
  
  

Shear Modulus
Not Available   
14.30 GPa   
40

Bulk Modulus
Not Available   
27.90 GPa   
99+

Young's Modulus
Not Available   
36.60 GPa   
99+

Poisson Ratio
Not Available   
0.28   
17

Other Mechanical Properties
NA   
Ductile   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
5.00   
99+
6.17   
99+

Magnetic Ordering
Nonmagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
NA   
Conductor   

Resistivity
100.00 nΩ·m   
31
615.00 nΩ·m   
7

Electrical Conductivity
Not Available   
0.01 106/cm Ω   
99+

Electron Affinity
Not Available   
48.00 kJ/mol   
23

Thermal Properties

Specific Heat
0.12 J/(kg K)   
40
0.19 J/(kg K)   
32

Molar Heat Capacity
Not Available   
27.11 J/mol·K   
21

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

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
12.10 µm/(m·K)   
32

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
399.60 kJ/mol   
17

Enthalpy of Fusion
Not Available   
6.20 kJ/mol   
99+

Enthalpy of Atomization
163.00 kJ/mol   
99+
431.00 kJ/mol   
16

Standard Molar Entropy
71.00 J/mol.K   
14
56.90 J/mol.K   
23

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