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Radium vs Technetium

Radium
Technetium
Technetium vs Radium


Periodic Table
Symbol
Ra   
Tc   
Group Number
2   
16
7   
11
Period Number
7   
5   
Block
s block   
d block   
Element Family
Alkaline Earth   
Transition Metal   
CAS Number
7440144   
99+
7440268   
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.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Mining, Ores of metals   
Made by Bombarding Molybdenum with Deuterons   
History
  
  
Who Discovered
Not Available   
Emilio Segrè and Carlo Perriero   
Discovery
In 1898   
In 1937   
Abundance
  
  
Abundance In Earth's Crust
0.00 %   
99+
Not Available   
Abundance In Oceans
0.00 %   
99+
Not Available   
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.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
NA   
NA   
Medical Uses
Pharmaceutical Industry   
NA   
Other Uses
NA   
Alloys, Nuclear Research, Research Purposes   
Biological Properties
  
  
Toxicity
Highly Toxic   
Low Toxic   
Present in Human Body
No   
No   
In Blood
Not Available   
0.00 Blood/mg dm-3   
37
In Bone
Not Available   
0.00 p.p.m.   
36
Physical Properties
Melting Point
700.00 °C   
99+
2,200.00 °C   
9
Boiling Point
1,737.00 °C   
99+
4,877.00 °C   
7
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Shiny Gray   
Luster
Metallic   
NA   
Hardness
  
  
Speed of Sound
Not Available   
16,200.00 m/s   
1
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   
Tc   
Isotopes
  
  
Known Isotopes
33   
6
18   
21
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.90   
11
Allred Rochow Electronegativity
0.97   
38
1.36   
20
Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   
Allen Electronegativity
0.89   
99+
1.51   
28
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.10   
99+
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
702.00 kJ/mol   
36
2nd Energy Level
979.00 kJ/mol   
99+
1,470.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,850.00 kJ/mol   
33
Electrochemical Equivalent
4.22 g/amp-hr   
6
0.52 g/amp-hr   
99+
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
88   
30
43   
99+
Electron Configuration
[Rn] 7s2   
[Kr] 4d5 5s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Technetium.jpg#100   
Atom
  
  
Number of Protons
88   
30
43   
99+
Number of Neutrons
138   
16
55   
99+
Number of Electrons
88   
30
43   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
136.00 pm   
99+
Covalent Radius
221.00 pm   
3
147.00 pm   
37
Van der Waals Radius
283.00 pm   
4
200.00 pm   
28
Atomic Weight
226.00 amu   
26
98.00 amu   
99+
Atomic Volume
45.20 cm3/mol   
4
8.50 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Molybdenum
  
Next Element
Actinium
  
Ruthenium
  
Valence Electron Potential
20.10 (-eV)   
99+
180.00 (-eV)   
3
Lattice Constant
514.80 pm   
13
273.50 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.60   
5
Mechanical Properties
Density
  
  
Density At Room Temperature
5.50 g/cm3   
99+
11.00 g/cm3   
34
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
5.00   
99+
11.50   
24
Magnetic Ordering
Nonmagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
NA   
Conductor   
Resistivity
100.00 nΩ·m   
31
200.00 nΩ·m   
18
Electrical Conductivity
Not Available   
0.07 106/cm Ω   
30
Electron Affinity
Not Available   
53.00 kJ/mol   
18
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.21 J/(kg K)   
29
Molar Heat Capacity
Not Available   
24.27 J/mol·K   
99+
Thermal Conductivity
18.60 W/m·K   
99+
50.60 W/m·K   
30
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
7.10 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
660.00 kJ/mol   
6
Enthalpy of Fusion
Not Available   
23.01 kJ/mol   
9
Enthalpy of Atomization
163.00 kJ/mol   
99+
649.00 kJ/mol   
8
Standard Molar Entropy
71.00 J/mol.K   
14
181.10 J/mol.K   
2
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