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Barium vs Technetium


Technetium vs Barium


Periodic Table

Symbol
Ba   
Tc   

Group Number
2   
16
7   
11

Period Number
6   
5   

Block
s block   
d block   

Element Family
Alkaline Earth   
Transition Metal   

CAS Number
7440393   
99+
7440268   
99+

Space Group Name
Im_ 3m   
P63/mmc   

Space Group Number
229.00   
1
194.00   
5

Facts

Interesting Facts
  • Barium oxidizes very easily in the air.
  • All toxic compounds of Barium can easily dissolve in water.
  • Barium carbonate is used to produce a Rat poison and its other compound Barium nitrate is used in fireworks to produce green color.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  

Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
Made by Bombarding Molybdenum with Deuterons   

History
  
  

Who Discovered
Carl Wilhelm Scheele   
Emilio Segrè and Carlo Perriero   

Discovery
In 1772   
In 1937   

Abundance
  
  

Abundance In Universe
1 * 10-6 %   
16
Not Available   

Abundance In Sun
~0.000001 %   
18
~-9999 %   

Abundance In Meteorites
0.00 %   
20
Not Available   

Abundance In Earth's Crust
0.03 %   
11
Not Available   

Abundance In Oceans
0.00 %   
8
Not Available   

Abundance In Humans
0.00 %   
12
Not Available   

Uses

Uses & Benefits
  • It is sued in chemical paint manufacturing and glass manufacturing.
  • Compounds of this metal are toxic; but still the barium sulfate is insoluble and given to patients suffering from digestive disorder.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  

Industrial Uses
Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry   
NA   

Medical Uses
NA   
NA   

Other Uses
Alloys   
Alloys, Nuclear Research, Research Purposes   

Biological Properties
  
  

Toxicity
Low Toxic   
Low Toxic   

Present in Human Body
Yes   
No   

In Blood
0.07 Blood/mg dm-3   
15
0.00 Blood/mg dm-3   
37

In Bone
70.00 p.p.m.   
9
0.00 p.p.m.   
36

Physical Properties

Melting Point
725.00 °C   
99+
2,200.00 °C   
9

Boiling Point
1,140.00 °C   
99+
4,877.00 °C   
7

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery Gray   
Shiny Gray   

Luster
NA   
NA   

Hardness
  
  

Mohs Hardness
1.25   
19
Not Available   

Speed of Sound
1,620.00 m/s   
99+
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
Ba   
Tc   

Isotopes
  
  

Known Isotopes
37   
2
18   
21

Electronegativity
  
  

Pauling Electronegativity
0.89   
99+
1.90   
11

Sanderson Electronegativity
0.68   
28
Not Available   

Allred Rochow Electronegativity
0.97   
38
1.36   
20

Mulliken-Jaffe Electronegativity
0.88   
22
Not Available   

Allen Electronegativity
0.88   
99+
1.51   
28

Electropositivity
  
  

Pauling Electropositivity
3.11   
4
2.10   
99+

Ionization Energies
  
  

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

2nd Energy Level
965.20 kJ/mol   
99+
1,470.00 kJ/mol   
99+

3rd Energy Level
3,600.00 kJ/mol   
14
2,850.00 kJ/mol   
33

Electrochemical Equivalent
2.56 g/amp-hr   
20
0.52 g/amp-hr   
99+

Electron Work Function
2.70 eV   
99+
Not Available   

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

Atomic Properties

Atomic Number
56   
99+
43   
99+

Electron Configuration
[Xe] 6s2   
[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
56   
99+
43   
99+

Number of Neutrons
81   
99+
55   
99+

Number of Electrons
56   
99+
43   
99+

Radius of an Atom
  
  

Atomic Radius
222.00 pm   
4
136.00 pm   
99+

Covalent Radius
215.00 pm   
5
147.00 pm   
37

Van der Waals Radius
268.00 pm   
6
200.00 pm   
28

Atomic Weight
137.33 amu   
99+
98.00 amu   
99+

Atomic Volume
39.24 cm3/mol   
5
8.50 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Cesium
  
Molybdenum
  

Next Element
Lanthanum
  
Ruthenium
  

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

Lattice Constant
502.80 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
Not Available   
1.60   
5

Mechanical Properties

Density
  
  

Density At Room Temperature
3.51 g/cm3   
99+
11.00 g/cm3   
34

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

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
7.11 (Pa)   
6
Not Available   

Elasticity properties
  
  

Shear Modulus
4.90 GPa   
99+
Not Available   

Bulk Modulus
9.60 GPa   
99+
Not Available   

Young's Modulus
13.00 GPa   
99+
Not Available   

Poisson Ratio
Not Available   
Not Available   

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
3.62   
99+
11.50   
24

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Superconductor   
Conductor   

Resistivity
332.00 nΩ·m   
13
200.00 nΩ·m   
18

Electrical Conductivity
0.03 106/cm Ω   
40
0.07 106/cm Ω   
30

Electron Affinity
13.95 kJ/mol   
36
53.00 kJ/mol   
18

Thermal Properties

Specific Heat
0.20 J/(kg K)   
30
0.21 J/(kg K)   
29

Molar Heat Capacity
28.07 J/mol·K   
12
24.27 J/mol·K   
99+

Thermal Conductivity
18.40 W/m·K   
99+
50.60 W/m·K   
30

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
20.60 µm/(m·K)   
22
7.10 µm/(m·K)   
99+

Enthalpy
  
  

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

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

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

Standard Molar Entropy
62.50 J/mol.K   
20
181.10 J/mol.K   
2

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