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Radium Technetium Comparison

Radium
Technetium
Technetium Radium comparison


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  
2
194.00  
7
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
-  
Emilio Segrè and Carlo Perriero  
Discovery
In 1898  
In 1937  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
0.00 %  
26
0.00 %  
18
Abundance In Meteorites
-  
-  
Abundance In Earth's Crust
0.00 %  
99+
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.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
-  
-  
Medical Uses
Pharmaceutical Industry  
-  
Other Uses
-  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Highly Toxic  
Low 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+
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  
-  
Hardness
  
  
Mohs Hardness
1.00  
22
2.25  
16
Brinell Hardness
700.00 MPa  
17
550.00 MPa  
27
Vickers Hardness
140.00 MPa  
99+
500.00 MPa  
35
Speed of Sound
3,150.00 m/s  
37
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
1.00  
99+
1.90  
18
Reflectivity
83.00 %  
6
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ra  
Tc  
Isotopes
  
  
Known Isotopes
33  
6
18  
21
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
1.90  
12
Sanderson Electronegativity
0.89  
99+
1.90  
13
Allred Rochow Electronegativity
0.97  
39
1.36  
21
Mulliken-Jaffe Electronegativity
0.92  
99+
1.90  
13
Allen Electronegativity
0.89  
99+
1.51  
31
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
509.30 kJ/mol  
99+
2,850.00 kJ/mol  
34
4th Energy Level
5,093.00 kJ/mol  
27
7,020.00 kJ/mol  
14
5th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
28
6th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
7th Energy level
5,090.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
8th Energy Level
5,090.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
9th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
10th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
39
11th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
37
12th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
13th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
33
14th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
23
15th Energy Level
50,900.00 kJ/mol  
99+
70,200.00 kJ/mol  
29
16th Energy Level
50,900.00 kJ/mol  
99+
70,200.00 kJ/mol  
24
17th Energy Level
509.30 kJ/mol  
99+
702.50 kJ/mol  
99+
18th Energy Level
5,090.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
19th Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
99+
20th Energy Level
509.00 kJ/mol  
99+
702.00 kJ/mol  
35
21st Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
99+
22nd Energy Level
509.00 kJ/mol  
99+
702.00 kJ/mol  
29
23rd Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
99+
24th Energy Level
509.30 kJ/mol  
99+
702.50 kJ/mol  
28
25th Energy Level
509.00 kJ/mol  
99+
702.00 kJ/mol  
30
26th Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
29
27th Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
30
28th Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
35
29th Energy Level
509.30 kJ/mol  
99+
702.00 kJ/mol  
36
30th Energy Level
509.00 kJ/mol  
99+
702.00 kJ/mol  
30
Electrochemical Equivalent
4.22 g/amp-hr  
6
0.52 g/amp-hr  
99+
Electron Work Function
4.30 eV  
25
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
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  
17
55  
99+
Number of Electrons
88  
30
43  
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
136.00 pm  
99+
Covalent Radius
221.00 pm  
3
147.00 pm  
39
Van der Waals Radius
283.00 pm  
5
200.00 pm  
35
Atomic Weight
226.00 amu  
26
98.00 amu  
99+
Atomic Volume
45.20 cm3/mol  
5
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  
15
273.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.57  
99+
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
11.00 g/cm3  
36
Density When Liquid (at m.p.)
5.50 g/cm3  
99+
11.00 g/cm3  
34
Tensile Strength
40.00 MPa  
99+
50.00 MPa  
38
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)  
99+
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
27.00 GPa  
34
Bulk Modulus
43.00 GPa  
33
100.00 GPa  
16
Young's Modulus
83.00 GPa  
25
50.00 GPa  
39
Poisson Ratio
0.31  
13
0.38  
6
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
11.50  
37
Magnetic Ordering
Nonmagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
17
Susceptibility
0.00  
18
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
100.00 nΩ·m  
31
200.00 nΩ·m  
18
Electrical Conductivity
0.00 106/cm Ω  
99+
0.07 106/cm Ω  
35
Electron Affinity
0.90 kJ/mol  
99+
53.00 kJ/mol  
23
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.21 J/(kg K)  
30
Molar Heat Capacity
20.05 J/mol·K  
99+
24.27 J/mol·K  
99+
Thermal Conductivity
18.60 W/m·K  
99+
50.60 W/m·K  
30
Critical Temperature
973.00 K  
99+
2,150.00 K  
16
Thermal Expansion
8.50 µm/(m·K)  
99+
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
113.00 kJ/mol  
99+
660.00 kJ/mol  
7
Enthalpy of Fusion
8.60 kJ/mol  
99+
23.01 kJ/mol  
9
Enthalpy of Atomization
163.00 kJ/mol  
99+
649.00 kJ/mol  
9
Standard Molar Entropy
71.00 J/mol.K  
14
181.10 J/mol.K  
2
Summary >>
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