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Technetium vs Yttrium

Technetium
Yttrium
Yttrium vs Technetium


Periodic Table
Symbol
Tc  
Y  
Group Number
7  
11
3  
15
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440268  
99+
7440655  
25
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Johan Gadolin  
Discovery
In 1937  
In 1794  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
18
Abundance In Sun
0.00 %  
18
0.00 %  
26
Abundance In Meteorites
-  
0.00 %  
21
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
22
Abundance In Oceans
-  
0.00 %  
25
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
  • It is also used as a catalyst in ethene polymerisation.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
26
In Bone
0.00 p.p.m.  
99+
0.07 p.p.m.  
30
Physical
Melting Point
2,200.00 °C  
9
1,523.00 °C  
27
Boiling Point
4,877.00 °C  
7
3,337.00 °C  
22
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Silvery White  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
2.25  
16
4.00  
11
Brinell Hardness
550.00 MPa  
27
589.00 MPa  
26
Vickers Hardness
500.00 MPa  
35
590.00 MPa  
29
Speed of Sound
16,200.00 m/s  
1
3,300.00 m/s  
34
Optical Properties
  
  
Refractive Index
1.90  
18
1.90  
18
Reflectivity
35.00 %  
34
83.00 %  
6
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Y  
Isotopes
  
  
Known Isotopes
18  
21
19  
20
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
1.22  
39
Sanderson Electronegativity
1.90  
13
0.65  
99+
Allred Rochow Electronegativity
1.36  
21
1.11  
30
Mulliken-Jaffe Electronegativity
1.90  
13
1.22  
38
Allen Electronegativity
1.51  
31
1.12  
99+
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
2.78  
16
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
600.00 kJ/mol  
99+
2nd Energy Level
1,470.00 kJ/mol  
99+
1,180.00 kJ/mol  
99+
3rd Energy Level
2,850.00 kJ/mol  
34
1,980.00 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
5,847.00 kJ/mol  
19
5th Energy Level
7,020.00 kJ/mol  
28
7,430.00 kJ/mol  
22
6th Energy Level
7,020.00 kJ/mol  
99+
8,970.00 kJ/mol  
23
7th Energy level
4,700.00 kJ/mol  
99+
11,190.00 kJ/mol  
18
8th Energy Level
4,700.00 kJ/mol  
99+
12,450.00 kJ/mol  
18
9th Energy Level
7,020.00 kJ/mol  
35
14,110.00 kJ/mol  
19
10th Energy Level
7,020.00 kJ/mol  
39
18,400.00 kJ/mol  
17
11th Energy Level
7,020.00 kJ/mol  
37
19,900.00 kJ/mol  
18
12th Energy Level
7,020.00 kJ/mol  
99+
36,090.00 kJ/mol  
25
13th Energy Level
7,020.00 kJ/mol  
33
6,000.00 kJ/mol  
99+
14th Energy Level
7,020.00 kJ/mol  
23
6,000.00 kJ/mol  
33
15th Energy Level
70,200.00 kJ/mol  
29
60,000.00 kJ/mol  
99+
16th Energy Level
70,200.00 kJ/mol  
24
60,000.00 kJ/mol  
34
17th Energy Level
702.50 kJ/mol  
99+
600.00 kJ/mol  
99+
18th Energy Level
7,020.00 kJ/mol  
35
6,000.00 kJ/mol  
99+
19th Energy Level
702.00 kJ/mol  
99+
600.00 kJ/mol  
99+
20th Energy Level
702.00 kJ/mol  
35
600.00 kJ/mol  
99+
21st Energy Level
702.00 kJ/mol  
99+
600.00 kJ/mol  
99+
22nd Energy Level
702.00 kJ/mol  
29
600.00 kJ/mol  
99+
23rd Energy Level
702.00 kJ/mol  
99+
600.00 kJ/mol  
99+
24th Energy Level
702.50 kJ/mol  
28
600.00 kJ/mol  
99+
25th Energy Level
702.00 kJ/mol  
30
600.00 kJ/mol  
99+
26th Energy Level
702.00 kJ/mol  
29
604.50 kJ/mol  
99+
27th Energy Level
702.00 kJ/mol  
30
604.50 kJ/mol  
99+
28th Energy Level
702.00 kJ/mol  
35
604.50 kJ/mol  
99+
29th Energy Level
702.00 kJ/mol  
36
604.50 kJ/mol  
99+
30th Energy Level
702.00 kJ/mol  
30
604.50 kJ/mol  
99+
Electrochemical Equivalent
0.52 g/amp-hr  
99+
1.11 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
3.10 eV  
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
43  
99+
39  
99+
Electron Configuration
[Kr] 4d5 5s2  
[Kr] 4d1 5s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
HCP-Crystal-Structure-of-Yttrium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
39  
99+
Number of Neutrons
55  
99+
50  
99+
Number of Electrons
43  
99+
39  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
180.00 pm  
16
Covalent Radius
147.00 pm  
39
190.00 pm  
18
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
98.00 amu  
99+
88.91 amu  
99+
Atomic Volume
8.50 cm3/mol  
99+
19.80 cm3/mol  
33
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Strontium
  
Next Element
Ruthenium
  
Zirconium
  
Valence Electron Potential
180.00 (-eV)  
3
48.00 (-eV)  
31
Lattice Constant
273.50 pm  
99+
364.74 pm  
34
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.60  
21
1.57  
39
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
4.47 g/cm3  
99+
Density When Liquid (at m.p.)
11.00 g/cm3  
34
4.24 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
160.00 MPa  
22
Viscosity
0.00  
25
0.00  
18
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
34
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
4.27 (Pa)  
10
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
25.60 GPa  
37
Bulk Modulus
100.00 GPa  
16
41.20 GPa  
35
Young's Modulus
50.00 GPa  
39
63.50 GPa  
34
Poisson Ratio
0.38  
6
0.24  
26
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
4.47  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
18
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
596.00 nΩ·m  
8
Electrical Conductivity
0.07 106/cm Ω  
35
0.02 106/cm Ω  
99+
Electron Affinity
53.00 kJ/mol  
23
29.60 kJ/mol  
36
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.30 J/(kg K)  
18
Molar Heat Capacity
24.27 J/mol·K  
99+
26.53 J/mol·K  
35
Thermal Conductivity
50.60 W/m·K  
30
17.20 W/m·K  
99+
Critical Temperature
2,150.00 K  
16
1,799.00 K  
31
Thermal Expansion
7.10 µm/(m·K)  
99+
10.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
393.00 kJ/mol  
25
Enthalpy of Fusion
23.01 kJ/mol  
9
17.15 kJ/mol  
16
Enthalpy of Atomization
649.00 kJ/mol  
9
418.00 kJ/mol  
23
Standard Molar Entropy
181.10 J/mol.K  
2
44.40 J/mol.K  
99+
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