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Technetium vs Radium

Technetium
Radium
Radium vs Technetium


Periodic Table
Symbol
Tc  
Ra  
Group Number
7  
11
2  
16
Period Number
5  
7  
Block
d block  
s block  
Element Family
Transition Metal  
Alkaline Earth  
CAS Number
7440268  
99+
7440144  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
5
229.00  
1
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Mining, Ores of metals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Not Available  
Discovery
In 1937  
In 1898  
Abundance
  
  
Abundance In Earth's Crust
Not Available  
0.00 %  
99+
Abundance In Oceans
Not Available  
0.00 %  
99+
Abundance In Humans
Not Available  
0.00 %  
20
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
NA  
NA  
Medical Uses
NA  
Pharmaceutical Industry  
Other Uses
Alloys, Nuclear Research, Research Purposes  
NA  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly 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
2,200.00 °C  
9
700.00 °C  
99+
Boiling Point
4,877.00 °C  
7
1,737.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Silvery White  
Luster
NA  
Metallic  
Hardness
  
  
Speed of Sound
16,200.00 m/s  
1
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
Tc  
Ra  
Isotopes
  
  
Known Isotopes
18  
21
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.90  
11
0.90  
99+
Allred Rochow Electronegativity
1.36  
20
0.97  
38
Mulliken-Jaffe Electronegativity
Not Available  
0.92  
20
Allen Electronegativity
1.51  
28
0.89  
99+
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
3.10  
5
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
509.30 kJ/mol  
99+
2nd Energy Level
1,470.00 kJ/mol  
99+
979.00 kJ/mol  
99+
3rd Energy Level
2,850.00 kJ/mol  
33
Not Available  
Electrochemical Equivalent
0.52 g/amp-hr  
99+
4.22 g/amp-hr  
6
Electron Work Function
Not Available  
Not Available  
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
43  
99+
88  
30
Electron Configuration
[Kr] 4d5 5s2  
[Rn] 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
43  
99+
88  
30
Number of Neutrons
55  
99+
138  
16
Number of Electrons
43  
99+
88  
30
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
Not Available  
Covalent Radius
147.00 pm  
37
221.00 pm  
3
Van der Waals Radius
200.00 pm  
28
283.00 pm  
4
Atomic Weight
98.00 amu  
99+
226.00 amu  
26
Atomic Volume
8.50 cm3/mol  
99+
45.20 cm3/mol  
4
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Francium
  
Next Element
Ruthenium
  
Actinium
  
Valence Electron Potential
180.00 (-eV)  
3
20.10 (-eV)  
99+
Lattice Constant
273.50 pm  
99+
514.80 pm  
13
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
5
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3  
34
5.50 g/cm3  
99+
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available  
Not Available  
Other Mechanical Properties
NA  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50  
24
5.00  
99+
Magnetic Ordering
Paramagnetic  
Nonmagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
NA  
Resistivity
200.00 nΩ·m  
18
100.00 nΩ·m  
31
Electrical Conductivity
0.07 106/cm Ω  
30
Not Available  
Electron Affinity
53.00 kJ/mol  
18
Not Available  
Thermal Properties
Specific Heat
0.21 J/(kg K)  
29
0.12 J/(kg K)  
40
Molar Heat Capacity
24.27 J/mol·K  
99+
Not Available  
Thermal Conductivity
50.60 W/m·K  
30
18.60 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
7.10 µm/(m·K)  
99+
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
6
Not Available  
Enthalpy of Fusion
23.01 kJ/mol  
9
Not Available  
Enthalpy of Atomization
649.00 kJ/mol  
8
163.00 kJ/mol  
99+
Standard Molar Entropy
181.10 J/mol.K  
2
71.00 J/mol.K  
14
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