Home
 Compare Metals

Molybdenum vs Erbium

Molybdenum
Erbium
Erbium vs Molybdenum


Periodic Table
Symbol
Mo  
Er  
Group Number
6  
12
Not Available  
Period Number
5  
6  
Block
d block  
f block  
Element Family
Transition Metal  
Lanthanide  
CAS Number
7439987  
99+
7440520  
35
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
1
194.00  
5
Facts
Interesting Facts
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Mining  
History
  
  
Who Discovered
Carl Wilhelm Scheele  
Carl Gustaf Mosander  
Discovery
In 1778  
In 1842  
Abundance
  
  
Abundance In Universe
5 * 10-7 %  
19
2 * 10-7 %  
22
Abundance In Sun
~0.0000009 %  
19
~0.0000001 %  
26
Abundance In Meteorites
0.00 %  
24
0.00 %  
36
Abundance In Earth's Crust
0.00 %  
39
0.00 %  
32
Abundance In Oceans
0.00 %  
9
0.00 %  
36
Abundance In Humans
0.00 %  
14
Not Available  
Uses
Uses & Benefits
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry  
Chemical Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Mildly Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
31
Not Available  
In Bone
0.70 p.p.m.  
18
Not Available  
Physical Properties
Melting Point
2,617.00 °C  
5
1,522.00 °C  
28
Boiling Point
4,612.00 °C  
9
2,510.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery White  
Luster
Metallic  
Lustrous  
Hardness
  
  
Mohs Hardness
5.50  
7
Not Available  
Brinell Hardness
1,370.00 MPa  
7
814.00 MPa  
11
Vickers Hardness
1,400.00 MPa  
6
589.00 MPa  
19
Speed of Sound
5,400.00 m/s  
6
2,830.00 m/s  
28
Optical Properties
  
  
Reflectivity
58.00 %  
15
Not Available  
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
Mo  
Er  
Isotopes
  
  
Known Isotopes
25  
14
31  
8
Electronegativity
  
  
Pauling Electronegativity
2.16  
5
1.24  
36
Sanderson Electronegativity
1.15  
19
Not Available  
Allred Rochow Electronegativity
1.30  
24
1.11  
29
Allen Electronegativity
2.16  
3
Not Available  
Electropositivity
  
  
Pauling Electropositivity
1.84  
99+
2.76  
18
Ionization Energies
  
  
1st Energy Level
684.30 kJ/mol  
37
589.30 kJ/mol  
99+
2nd Energy Level
1,560.00 kJ/mol  
37
1,150.00 kJ/mol  
99+
3rd Energy Level
2,618.00 kJ/mol  
99+
2,194.00 kJ/mol  
99+
4th Energy Level
4,480.00 kJ/mol  
26
4,120.00 kJ/mol  
33
5th Energy Level
5,257.00 kJ/mol  
32
Not Available  
6th Energy Level
6,640.80 kJ/mol  
22
Not Available  
7th Energy level
12,125.00 kJ/mol  
13
Not Available  
8th Energy Level
13,860.00 kJ/mol  
16
Not Available  
9th Energy Level
15,835.00 kJ/mol  
16
Not Available  
10th Energy Level
17,980.00 kJ/mol  
18
Not Available  
11th Energy Level
20,190.00 kJ/mol  
17
Not Available  
12th Energy Level
22,219.00 kJ/mol  
15
Not Available  
13th Energy Level
26,930.00 kJ/mol  
13
Not Available  
14th Energy Level
29,196.00 kJ/mol  
13
Not Available  
15th Energy Level
52,490.00 kJ/mol  
7
Not Available  
16th Energy Level
55,000.00 kJ/mol  
8
Not Available  
17th Energy Level
61,400.00 kJ/mol  
9
Not Available  
18th Energy Level
67,700.00 kJ/mol  
9
Not Available  
19th Energy Level
74,000.00 kJ/mol  
9
Not Available  
20th Energy Level
80,400.00 kJ/mol  
10
Not Available  
21st Energy Level
87,000.00 kJ/mol  
9
Not Available  
22nd Energy Level
93,400.00 kJ/mol  
7
Not Available  
23rd Energy Level
98,420.00 kJ/mol  
6
Not Available  
24th Energy Level
104,400.00 kJ/mol  
2
Not Available  
25th Energy Level
121,900.00 kJ/mol  
1
Not Available  
26th Energy Level
127,700.00 kJ/mol  
1
Not Available  
27th Energy Level
133,800.00 kJ/mol  
1
Not Available  
28th Energy Level
139,800.00 kJ/mol  
1
Not Available  
29th Energy Level
148,100.00 kJ/mol  
1
Not Available  
30th Energy Level
154,500.00 kJ/mol  
1
Not Available  
Electrochemical Equivalent
0.89 g/amp-hr  
99+
2.08 g/amp-hr  
28
Electron Work Function
4.60 eV  
12
Not Available  
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
42  
99+
68  
99+
Electron Configuration
[Kr] 4d5 5s1  
[Xe] 4f12 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
HCP-Crystal-Structure-of-Erbium.jpg#100  
Atom
  
  
Number of Protons
42  
99+
68  
99+
Number of Neutrons
54  
99+
99  
33
Number of Electrons
42  
99+
68  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
39
176.00 pm  
18
Covalent Radius
154.00 pm  
32
189.00 pm  
19
Van der Waals Radius
200.00 pm  
28
Not Available  
Atomic Weight
95.95 amu  
99+
167.26 amu  
99+
Atomic Volume
9.40 cm3/mol  
99+
18.40 cm3/mol  
25
Adjacent Atomic Numbers
  
  
Previous Element
Niobium
  
Holmium
  
Next Element
Technetium
  
Thulium
  
Valence Electron Potential
88.60 (-eV)  
13
49.00 (-eV)  
29
Lattice Constant
314.70 pm  
99+
355.88 pm  
39
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.57  
17
Mechanical Properties
Density
  
  
Density At Room Temperature
10.28 g/cm3  
36
9.07 g/cm3  
99+
Density When Liquid (at m.p.)
9.33 g/cm3  
20
8.86 g/cm3  
23
Tensile Strength
324.00 MPa  
13
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available  
0.00 (Pa)  
20
Vapor Pressure at 2000 K
0.00 (Pa)  
26
Not Available  
Elasticity properties
  
  
Shear Modulus
126.00 GPa  
8
28.30 GPa  
25
Bulk Modulus
230.00 GPa  
6
44.40 GPa  
27
Young's Modulus
329.00 GPa  
6
69.90 GPa  
29
Poisson Ratio
0.31  
13
0.24  
28
Other Mechanical Properties
Ductile, Weldable  
Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.22  
27
9.07  
32
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Semiconductor  
Conductor  
Resistivity
53.40 nΩ·m  
99+
0.86 nΩ·m  
99+
Electrical Conductivity
0.19 106/cm Ω  
11
0.01 106/cm Ω  
99+
Electron Affinity
71.90 kJ/mol  
14
50.00 kJ/mol  
21
Thermal Properties
Specific Heat
0.25 J/(kg K)  
21
0.17 J/(kg K)  
34
Molar Heat Capacity
24.06 J/mol·K  
99+
28.12 J/mol·K  
11
Thermal Conductivity
138.00 W/m·K  
12
14.50 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
4.80 µm/(m·K)  
99+
12.20 µm/(m·K)  
31
Enthalpy
  
  
Enthalpy of Vaporization
594.10 kJ/mol  
8
261.00 kJ/mol  
35
Enthalpy of Fusion
27.61 kJ/mol  
5
17.20 kJ/mol  
15
Enthalpy of Atomization
653.00 kJ/mol  
7
314.00 kJ/mol  
33
Standard Molar Entropy
28.70 J/mol.K  
99+
73.10 J/mol.K  
11
Periodic Table >>
<< All

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

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