Home
 Compare Metals

Erbium Technetium Comparison

Erbium
Technetium
Technetium Erbium comparison


Periodic Table
Symbol
Er  
Tc  
Group Number
3  
15
7  
11
Period Number
6  
5  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440520  
35
7440268  
99+
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Mining  
Made by Bombarding Molybdenum with Deuterons  
History
  
  
Who Discovered
Carl Gustaf Mosander  
Emilio Segrè and Carlo Perriero  
Discovery
In 1842  
In 1937  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
40
Abundance In Sun
0.00 %  
26
0.00 %  
18
Abundance In Meteorites
0.00 %  
36
-  
Abundance In Earth's Crust
0.00 %  
32
0.00 %  
99+
Abundance In Oceans
0.00 %  
36
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
  • Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
Chemical Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Mildly Toxic  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,522.00 °C  
28
2,200.00 °C  
9
Boiling Point
2,510.00 °C  
99+
4,877.00 °C  
7
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Shiny Gray  
Luster
Lustrous  
-  
Hardness
  
  
Mohs Hardness
1.00  
22
2.25  
16
Brinell Hardness
814.00 MPa  
12
550.00 MPa  
27
Vickers Hardness
589.00 MPa  
30
500.00 MPa  
35
Speed of Sound
2,830.00 m/s  
99+
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
1.76  
24
1.90  
18
Reflectivity
36.00 %  
33
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Er  
Tc  
Isotopes
  
  
Known Isotopes
31  
8
18  
21
Electronegativity
  
  
Pauling Electronegativity
1.24  
37
1.90  
12
Sanderson Electronegativity
1.24  
29
1.90  
13
Allred Rochow Electronegativity
1.11  
30
1.36  
21
Mulliken-Jaffe Electronegativity
1.24  
36
1.90  
13
Allen Electronegativity
1.24  
99+
1.51  
31
Electropositivity
  
  
Pauling Electropositivity
2.76  
18
2.10  
99+
Ionization Energies
  
  
1st Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
36
2nd Energy Level
1,150.00 kJ/mol  
99+
1,470.00 kJ/mol  
99+
3rd Energy Level
2,194.00 kJ/mol  
99+
2,850.00 kJ/mol  
34
4th Energy Level
4,120.00 kJ/mol  
99+
7,020.00 kJ/mol  
14
5th Energy Level
5,897.00 kJ/mol  
99+
7,020.00 kJ/mol  
28
6th Energy Level
5,897.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
7th Energy level
5,890.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
8th Energy Level
5,890.00 kJ/mol  
99+
4,700.00 kJ/mol  
99+
9th Energy Level
4,240.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
10th Energy Level
5,890.00 kJ/mol  
99+
7,020.00 kJ/mol  
39
11th Energy Level
5,890.00 kJ/mol  
99+
7,020.00 kJ/mol  
37
12th Energy Level
5,890.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
13th Energy Level
5,890.00 kJ/mol  
99+
7,020.00 kJ/mol  
33
14th Energy Level
5,890.00 kJ/mol  
37
7,020.00 kJ/mol  
23
15th Energy Level
58,900.00 kJ/mol  
99+
70,200.00 kJ/mol  
29
16th Energy Level
58,900.00 kJ/mol  
38
70,200.00 kJ/mol  
24
17th Energy Level
589.30 kJ/mol  
99+
702.50 kJ/mol  
99+
18th Energy Level
5,890.00 kJ/mol  
99+
7,020.00 kJ/mol  
35
19th Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
99+
20th Energy Level
589.00 kJ/mol  
99+
702.00 kJ/mol  
35
21st Energy Level
5,897.00 kJ/mol  
19
702.00 kJ/mol  
99+
22nd Energy Level
589.00 kJ/mol  
99+
702.00 kJ/mol  
29
23rd Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
99+
24th Energy Level
589.30 kJ/mol  
99+
702.50 kJ/mol  
28
25th Energy Level
589.00 kJ/mol  
99+
702.00 kJ/mol  
30
26th Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
29
27th Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
30
28th Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
35
29th Energy Level
589.30 kJ/mol  
99+
702.00 kJ/mol  
36
30th Energy Level
589.70 kJ/mol  
99+
702.00 kJ/mol  
30
Electrochemical Equivalent
2.08 g/amp-hr  
32
0.52 g/amp-hr  
99+
Electron Work Function
5.93 eV  
2
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
68  
99+
43  
99+
Electron Configuration
[Xe] 4f12 6s2  
[Kr] 4d5 5s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100  
HCP-Crystal-Structure-of-Technetium.jpg#100  
Atom
  
  
Number of Protons
68  
99+
43  
99+
Number of Neutrons
99  
34
55  
99+
Number of Electrons
68  
99+
43  
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
20
136.00 pm  
99+
Covalent Radius
189.00 pm  
19
147.00 pm  
39
Van der Waals Radius
0.00 pm  
99+
200.00 pm  
35
Atomic Weight
167.26 amu  
99+
98.00 amu  
99+
Atomic Volume
18.40 cm3/mol  
37
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Holmium
  
Molybdenum
  
Next Element
Thulium
  
Ruthenium
  
Valence Electron Potential
49.00 (-eV)  
30
180.00 (-eV)  
3
Lattice Constant
355.88 pm  
99+
273.50 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.57  
40
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
9.07 g/cm3  
99+
11.00 g/cm3  
36
Density When Liquid (at m.p.)
8.86 g/cm3  
99+
11.00 g/cm3  
34
Tensile Strength
350.00 MPa  
12
50.00 MPa  
38
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
21
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
28.30 GPa  
31
27.00 GPa  
34
Bulk Modulus
44.40 GPa  
31
100.00 GPa  
16
Young's Modulus
69.90 GPa  
31
50.00 GPa  
39
Poisson Ratio
0.24  
28
0.38  
6
Other Mechanical Properties
Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.07  
99+
11.50  
37
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
11
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
0.86 nΩ·m  
99+
200.00 nΩ·m  
18
Electrical Conductivity
0.01 106/cm Ω  
99+
0.07 106/cm Ω  
35
Electron Affinity
50.00 kJ/mol  
26
53.00 kJ/mol  
23
Thermal
Specific Heat
0.17 J/(kg K)  
35
0.21 J/(kg K)  
30
Molar Heat Capacity
28.12 J/mol·K  
14
24.27 J/mol·K  
99+
Thermal Conductivity
14.50 W/m·K  
99+
50.60 W/m·K  
30
Critical Temperature
1,802.00 K  
30
2,150.00 K  
16
Thermal Expansion
12.20 µm/(m·K)  
99+
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
261.00 kJ/mol  
99+
660.00 kJ/mol  
7
Enthalpy of Fusion
17.20 kJ/mol  
15
23.01 kJ/mol  
9
Enthalpy of Atomization
314.00 kJ/mol  
99+
649.00 kJ/mol  
9
Standard Molar Entropy
73.10 J/mol.K  
11
181.10 J/mol.K  
2
Summary >>
<< Thermal

Compare Lanthanide Series

Lanthanide Series

Lanthanide Series

» More Lanthanide Series

Compare Lanthanide Series

» More Compare Lanthanide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!