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Radium vs Meitnerium

Radium
Meitnerium
Meitnerium vs Radium


Periodic Table
Symbol
Ra  
Mt  
Group Number
2  
16
9  
9
Period Number
7  
7  
Block
s block  
d block  
Element Family
Alkaline Earth  
Probably Transition  
CAS Number
7440144  
99+
54038016  
10
Space Group Name
Im_ 3m  
-  
Space Group Number
229.00  
2
166.00  
9
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.
  
Meitnerium is named after Lise Meitner, an Austrian physicist.  
Sources
Mining, Ores of metals  
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
History
  
  
Who Discovered
-  
Gesellschaft für Schwerionenforschung  
Discovery
In 1898  
In 1982  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
0.00 %  
26
-  
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
0.00 %  
99+
-  
Abundance In Humans
0.00 %  
23
-  
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.
  
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
Pharmaceutical Industry  
-  
Other Uses
-  
-  
Biological Properties
  
  
Toxicity
Highly Toxic  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
34
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
700.00 °C  
99+
-  
Boiling Point
1,737.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
1.00  
22
-  
Brinell Hardness
700.00 MPa  
17
400.00 MPa  
34
Vickers Hardness
140.00 MPa  
99+
350.00 MPa  
99+
Speed of Sound
3,150.00 m/s  
37
3,200.00 m/s  
35
Optical Properties
  
  
Refractive Index
1.00  
99+
1.30  
99+
Reflectivity
83.00 %  
6
68.00 %  
15
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ra  
Mt  
Isotopes
  
  
Known Isotopes
33  
6
4  
33
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
1.30  
33
Sanderson Electronegativity
0.89  
99+
1.90  
13
Allred Rochow Electronegativity
0.97  
39
1.30  
25
Mulliken-Jaffe Electronegativity
0.92  
99+
1.30  
33
Allen Electronegativity
0.89  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
3.10  
5
2.00  
99+
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol  
99+
800.80 kJ/mol  
15
2nd Energy Level
979.00 kJ/mol  
99+
1,823.60 kJ/mol  
18
3rd Energy Level
509.30 kJ/mol  
99+
2,904.20 kJ/mol  
31
4th Energy Level
5,093.00 kJ/mol  
27
3,859.40 kJ/mol  
99+
5th Energy Level
5,090.00 kJ/mol  
99+
4,920.80 kJ/mol  
99+
6th Energy Level
5,090.00 kJ/mol  
99+
8,000.00 kJ/mol  
34
7th Energy level
5,090.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
8th Energy Level
5,090.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
9th Energy Level
5,090.00 kJ/mol  
99+
6,700.00 kJ/mol  
36
10th Energy Level
5,090.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
11th Energy Level
5,090.00 kJ/mol  
99+
6,300.00 kJ/mol  
99+
12th Energy Level
5,090.00 kJ/mol  
99+
0.00 kJ/mol  
99+
13th Energy Level
5,090.00 kJ/mol  
99+
8,000.00 kJ/mol  
20
14th Energy Level
5,090.00 kJ/mol  
99+
1,156.00 kJ/mol  
99+
15th Energy Level
50,900.00 kJ/mol  
99+
80,000.00 kJ/mol  
17
16th Energy Level
50,900.00 kJ/mol  
99+
58,700.00 kJ/mol  
39
17th Energy Level
509.30 kJ/mol  
99+
1,110.00 kJ/mol  
20
18th Energy Level
5,090.00 kJ/mol  
99+
8,000.00 kJ/mol  
23
19th Energy Level
509.30 kJ/mol  
99+
1,110.00 kJ/mol  
17
20th Energy Level
509.00 kJ/mol  
99+
850.00 kJ/mol  
18
21st Energy Level
509.30 kJ/mol  
99+
800.00 kJ/mol  
99+
22nd Energy Level
509.00 kJ/mol  
99+
380.00 kJ/mol  
99+
23rd Energy Level
509.30 kJ/mol  
99+
8,000.00 kJ/mol  
9
24th Energy Level
509.30 kJ/mol  
99+
565.60 kJ/mol  
99+
25th Energy Level
509.00 kJ/mol  
99+
800.00 kJ/mol  
13
26th Energy Level
509.30 kJ/mol  
99+
800.00 kJ/mol  
13
27th Energy Level
509.30 kJ/mol  
99+
800.00 kJ/mol  
12
28th Energy Level
509.30 kJ/mol  
99+
800.00 kJ/mol  
18
29th Energy Level
509.30 kJ/mol  
99+
800.00 kJ/mol  
18
30th Energy Level
509.00 kJ/mol  
99+
800.00 kJ/mol  
13
Electrochemical Equivalent
4.22 g/amp-hr  
6
3.00 g/amp-hr  
21
Electron Work Function
4.30 eV  
25
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
88  
30
109  
9
Electron Configuration
[Rn] 7s2  
[Rn] 5f14 6d7 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
Atom
  
  
Number of Protons
88  
30
109  
9
Number of Neutrons
138  
17
157  
8
Number of Electrons
88  
30
109  
9
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
122.00 pm  
99+
Covalent Radius
221.00 pm  
3
129.00 pm  
99+
Van der Waals Radius
283.00 pm  
5
260.00 pm  
9
Atomic Weight
226.00 amu  
26
278.00 amu  
7
Atomic Volume
45.20 cm3/mol  
5
20.20 cm3/mol  
30
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Hassium
  
Next Element
Actinium
  
Darmstadtium
  
Valence Electron Potential
20.10 (-eV)  
99+
31.20 (-eV)  
99+
Lattice Constant
514.80 pm  
15
0.00 pm  
99+
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.57  
99+
1.59  
27
Mechanical
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
37.40 g/cm3  
2
Density When Liquid (at m.p.)
5.50 g/cm3  
99+
37.40 g/cm3  
2
Tensile Strength
40.00 MPa  
99+
80.00 MPa  
29
Viscosity
0.00  
2
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
33
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
35.00 GPa  
21
Bulk Modulus
43.00 GPa  
33
0.00 GPa  
99+
Young's Modulus
83.00 GPa  
25
13.50 GPa  
99+
Poisson Ratio
0.31  
13
0.25  
24
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
37.40  
4
Magnetic Ordering
Nonmagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
12
Susceptibility
0.00  
18
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
100.00 nΩ·m  
31
0.35 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
0.90 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.10 J/(kg K)  
99+
Molar Heat Capacity
20.05 J/mol·K  
99+
27.00 J/mol·K  
29
Thermal Conductivity
18.60 W/m·K  
99+
0.00 W/m·K  
99+
Critical Temperature
973.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
8.50 µm/(m·K)  
99+
10.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
113.00 kJ/mol  
99+
110.00 kJ/mol  
99+
Enthalpy of Fusion
8.60 kJ/mol  
99+
-  
Enthalpy of Atomization
163.00 kJ/mol  
99+
350.20 kJ/mol  
37
Standard Molar Entropy
71.00 J/mol.K  
14
63.80 J/mol.K  
22
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