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Technetium vs Potassium


Potassium vs Technetium


Periodic Table

Symbol
Tc   
K   

Group Number
7   
11
1   
17

Period Number
5   
4   

Block
d block   
s block   

Element Family
Transition Metal   
Alkali   

CAS Number
7440268   
99+
7440097   
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.
  
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  

Sources
Made by Bombarding Molybdenum with Deuterons   
Found in Minerals, Mining   

History
  
  

Who Discovered
Emilio Segrè and Carlo Perriero   
Humphry Davy   

Discovery
In 1937   
In 1807   

Abundance
  
  

Abundance In Universe
Not Available   
3 * 10-4 %   
9

Abundance In Sun
~-9999 %   
~0.0004 %   
9

Abundance In Meteorites
Not Available   
0.07 %   
9

Abundance In Earth's Crust
Not Available   
1.50 %   
6

Abundance In Oceans
Not Available   
0.04 %   
3

Abundance In Humans
Not Available   
0.20 %   
2

Uses

Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Potassium’s compounds are in high demand for their application in Fertilizer manufacturing.
  • Potassium carbonate is used in glass manufacturing and Potassium carbonate in manufacturing detergent and body wash.
  

Industrial Uses
NA   
Ammunition Industry, Chemical Industry   

Medical Uses
NA   
Pharmaceutical Industry   

Other Uses
Alloys, Nuclear Research, Research Purposes   
NA   

Biological Properties
  
  

Toxicity
Low Toxic   
Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
1,620.00 Blood/mg dm-3   
2

In Bone
0.00 p.p.m.   
36
2,100.00 p.p.m.   
3

Physical Properties

Melting Point
2,200.00 °C   
9
63.65 °C   
99+

Boiling Point
4,877.00 °C   
7
774.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Shiny Gray   
Silvery Gray   

Luster
NA   
NA   

Hardness
  
  

Mohs Hardness
Not Available   
0.40   
23

Brinell Hardness
Not Available   
0.36 MPa   
99+

Speed of Sound
16,200.00 m/s   
1
2,000.00 m/s   
99+

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   
K   

Isotopes
  
  

Known Isotopes
18   
21
20   
19

Electronegativity
  
  

Pauling Electronegativity
1.90   
11
0.82   
99+

Sanderson Electronegativity
Not Available   
0.45   
31

Allred Rochow Electronegativity
1.36   
20
0.91   
39

Mulliken-Jaffe Electronegativity
Not Available   
0.73   
23

Allen Electronegativity
1.51   
28
0.73   
99+

Electropositivity
  
  

Pauling Electropositivity
2.10   
99+
3.18   
3

Ionization Energies
  
  

1st Energy Level
702.00 kJ/mol   
36
418.80 kJ/mol   
99+

2nd Energy Level
1,470.00 kJ/mol   
99+
3,052.00 kJ/mol   
5

3rd Energy Level
2,850.00 kJ/mol   
33
4,420.00 kJ/mol   
8

4th Energy Level
Not Available   
5,877.00 kJ/mol   
9

5th Energy Level
Not Available   
7,975.00 kJ/mol   
8

6th Energy Level
Not Available   
9,590.00 kJ/mol   
13

7th Energy level
Not Available   
11,343.00 kJ/mol   
17

8th Energy Level
Not Available   
14,944.00 kJ/mol   
13

9th Energy Level
Not Available   
16,963.70 kJ/mol   
15

10th Energy Level
Not Available   
48,610.00 kJ/mol   
3

11th Energy Level
Not Available   
54,490.00 kJ/mol   
4

12th Energy Level
Not Available   
60,730.00 kJ/mol   
4

13th Energy Level
Not Available   
68,950.00 kJ/mol   
4

14th Energy Level
Not Available   
75,900.00 kJ/mol   
5

15th Energy Level
Not Available   
83,080.00 kJ/mol   
6

16th Energy Level
Not Available   
93,400.00 kJ/mol   
7

17th Energy Level
Not Available   
99,710.00 kJ/mol   
8

Electrochemical Equivalent
0.52 g/amp-hr   
99+
1.46 g/amp-hr   
99+

Electron Work Function
Not Available   
2.30 eV   
99+

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Flammability, Ionization, Solubility   

Atomic Properties

Atomic Number
43   
99+
19   
99+

Electron Configuration
[Kr] 4d5 5s2   
[Ar] 4s1   

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+
19   
99+

Number of Neutrons
55   
99+
20   
99+

Number of Electrons
43   
99+
19   
99+

Radius of an Atom
  
  

Atomic Radius
136.00 pm   
99+
227.00 pm   
3

Covalent Radius
147.00 pm   
37
203.00 pm   
9

Van der Waals Radius
200.00 pm   
28
275.00 pm   
5

Atomic Weight
98.00 amu   
99+
39.10 amu   
99+

Atomic Volume
8.50 cm3/mol   
99+
45.46 cm3/mol   
3

Adjacent Atomic Numbers
  
  

Previous Element
Molybdenum
  
Aluminium
  

Next Element
Ruthenium
  
Calcium
  

Valence Electron Potential
180.00 (-eV)   
3
10.40 (-eV)   
99+

Lattice Constant
273.50 pm   
99+
532.80 pm   
12

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
0.86 g/cm3   
99+

Density When Liquid (at m.p.)
Not Available   
0.83 g/cm3   
99+

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Elasticity properties
  
  

Shear Modulus
Not Available   
1.30 GPa   
99+

Bulk Modulus
Not Available   
3.10 GPa   
99+

Young's Modulus
Not Available   
3.53 GPa   
99+

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
11.50   
24
0.86   
99+

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
200.00 nΩ·m   
18
72.00 nΩ·m   
37

Electrical Conductivity
0.07 106/cm Ω   
30
0.14 106/cm Ω   
14

Electron Affinity
53.00 kJ/mol   
18
48.40 kJ/mol   
22

Thermal Properties

Specific Heat
0.21 J/(kg K)   
29
0.75 J/(kg K)   
6

Molar Heat Capacity
24.27 J/mol·K   
99+
29.60 J/mol·K   
6

Thermal Conductivity
50.60 W/m·K   
30
102.50 W/m·K   
15

Critical Temperature
Not Available   
2,223.00 K   
3

Thermal Expansion
7.10 µm/(m·K)   
99+
83.30 µm/(m·K)   
3

Enthalpy
  
  

Enthalpy of Vaporization
660.00 kJ/mol   
6
77.50 kJ/mol   
99+

Enthalpy of Fusion
23.01 kJ/mol   
9
2.32 kJ/mol   
99+

Enthalpy of Atomization
649.00 kJ/mol   
8
89.50 kJ/mol   
99+

Standard Molar Entropy
181.10 J/mol.K   
2
64.70 J/mol.K   
18

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