Home
Compare Metals


Technetium Radium Comparison


Radium Technetium comparison


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

Summary >>
<< Thermal

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

» More Compare Transition Metals