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Lutetium vs Chromium

Lutetium
Chromium
Chromium vs Lutetium


Periodic Table
Symbol
Lu  
Cr  
Group Number
3  
15
6  
12
Period Number
6  
4  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7439943  
99+
7440473  
39
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Metal dust of Lutetium element is highly explosive.
  • Lutetium metal is corrosion resistance and acts stable in air.
  
  • Chromium is highly reactive, hence it is not found free in nature.
  • Ores of Chromites mineral are the major source of Chromium metal.
  • Almost 90% leather tanning is done with the help of chromium.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Georges Urbain and Carl Auer von Welsbach  
Louis Nicolas Vauquelin  
Discovery
In 1906  
In Between 1797 - 1798  
Abundance
  
  
Abundance In Universe
0.00 %  
31
0.00 %  
8
Abundance In Sun
0.00 %  
26
0.00 %  
7
Abundance In Meteorites
0.00 %  
99+
0.30 %  
7
Abundance In Earth's Crust
0.00 %  
99+
0.01 %  
13
Abundance In Oceans
0.00 %  
99+
0.00 %  
16
Abundance In Humans
0.00 %  
24
0.00 %  
19
Uses
Uses & Benefits
  • Lutetium metal is used outside research. It has commercial uses like Industrial catalyst for cracking oil refineries of hydrocarbons .
  
  • It is used to harden the steel and produces a stainless steel and other various alloys.
  • It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.
  
Industrial Uses
-  
Automobile Industry, Chemical Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.11 Blood/mg dm-3  
12
In Bone
0.00 p.p.m.  
99+
0.33 p.p.m.  
25
Physical
Melting Point
1,652.00 °C  
19
1,857.00 °C  
14
Boiling Point
3,402.00 °C  
20
2,672.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.50  
10
8.50  
1
Brinell Hardness
893.00 MPa  
11
687.00 MPa  
18
Vickers Hardness
1,160.00 MPa  
14
1,060.00 MPa  
17
Speed of Sound
5,200.00 m/s  
10
5,940.00 m/s  
8
Optical Properties
  
  
Refractive Index
1.90  
18
2.97  
2
Reflectivity
60.00 %  
23
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Lu  
Cr  
Isotopes
  
  
Known Isotopes
35  
4
21  
18
Electronegativity
  
  
Pauling Electronegativity
1.27  
35
1.66  
19
Sanderson Electronegativity
1.27  
27
1.66  
17
Allred Rochow Electronegativity
1.14  
29
1.56  
11
Mulliken-Jaffe Electronegativity
1.27  
34
1.66  
19
Allen Electronegativity
1.27  
99+
1.65  
22
Electropositivity
  
  
Pauling Electropositivity
2.73  
20
2.34  
36
Ionization Energies
  
  
1st Energy Level
523.50 kJ/mol  
99+
26,130.00 kJ/mol  
1
2nd Energy Level
1,340.00 kJ/mol  
99+
28,750.00 kJ/mol  
1
3rd Energy Level
2,022.30 kJ/mol  
99+
34,230.00 kJ/mol  
1
4th Energy Level
4,370.00 kJ/mol  
38
37,066.00 kJ/mol  
1
5th Energy Level
6,445.00 kJ/mol  
34
97,510.00 kJ/mol  
1
6th Energy Level
5,230.00 kJ/mol  
99+
105,800.00 kJ/mol  
1
7th Energy level
5,230.00 kJ/mol  
99+
114,300.00 kJ/mol  
1
8th Energy Level
5,230.00 kJ/mol  
99+
125,300.00 kJ/mol  
1
9th Energy Level
5,230.00 kJ/mol  
99+
134,700.00 kJ/mol  
1
10th Energy Level
5,230.00 kJ/mol  
99+
144,300.00 kJ/mol  
1
11th Energy Level
5,235.00 kJ/mol  
99+
26,130.00 kJ/mol  
12
12th Energy Level
5,230.00 kJ/mol  
99+
28,750.00 kJ/mol  
36
13th Energy Level
5,230.00 kJ/mol  
99+
34,230.00 kJ/mol  
10
14th Energy Level
5,230.00 kJ/mol  
99+
37,066.00 kJ/mol  
12
15th Energy Level
52,300.00 kJ/mol  
99+
97,510.00 kJ/mol  
2
16th Energy Level
52,300.00 kJ/mol  
99+
105,800.00 kJ/mol  
2
17th Energy Level
523.50 kJ/mol  
99+
114,300.00 kJ/mol  
3
18th Energy Level
5,230.00 kJ/mol  
99+
125,300.00 kJ/mol  
4
19th Energy Level
523.50 kJ/mol  
99+
134,700.00 kJ/mol  
5
20th Energy Level
523.00 kJ/mol  
99+
144,300.00 kJ/mol  
7
21st Energy Level
523.50 kJ/mol  
99+
157,700.00 kJ/mol  
7
22nd Energy Level
523.00 kJ/mol  
99+
166,090.00 kJ/mol  
6
23rd Energy Level
5,230.00 kJ/mol  
28
653.80 kJ/mol  
99+
24th Energy Level
523.50 kJ/mol  
99+
653.80 kJ/mol  
32
25th Energy Level
523.00 kJ/mol  
99+
653.80 kJ/mol  
34
26th Energy Level
523.50 kJ/mol  
99+
653.80 kJ/mol  
33
27th Energy Level
523.50 kJ/mol  
99+
652.90 kJ/mol  
34
28th Energy Level
523.50 kJ/mol  
99+
653.80 kJ/mol  
39
29th Energy Level
523.50 kJ/mol  
99+
653.80 kJ/mol  
40
30th Energy Level
523.00 kJ/mol  
99+
653.80 kJ/mol  
36
Electrochemical Equivalent
2.18 g/amp-hr  
27
0.32 g/amp-hr  
99+
Electron Work Function
3.30 eV  
99+
4.50 eV  
19
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
71  
99+
24  
99+
Electron Configuration
[Xe] 6s2 4f14 5d1  
[Ar] 3d5 4s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
71  
99+
24  
99+
Number of Neutrons
104  
31
28  
99+
Number of Electrons
71  
99+
24  
99+
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
22
128.00 pm  
99+
Covalent Radius
187.00 pm  
20
139.00 pm  
99+
Van der Waals Radius
221.00 pm  
27
200.00 pm  
35
Atomic Weight
174.97 amu  
40
52.00 amu  
99+
Atomic Volume
17.78 cm3/mol  
99+
7.23 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Ytterbium
  
Vanadium
  
Next Element
Hafnium
  
Manganese
  
Valence Electron Potential
50.90 (-eV)  
27
170.00 (-eV)  
4
Lattice Constant
350.31 pm  
99+
291.00 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.59  
32
1.86  
4
Mechanical
Density
  
  
Density At Room Temperature
9.84 g/cm3  
99+
7.19 g/cm3  
99+
Density When Liquid (at m.p.)
9.30 g/cm3  
99+
6.30 g/cm3  
99+
Tensile Strength
230.00 MPa  
18
689.00 MPa  
7
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
35
0.00 (Pa)  
26
Vapor Pressure at 2000 K
3.18 (Pa)  
11
774.00 (Pa)  
1
Elasticity properties
  
  
Shear Modulus
27.20 GPa  
33
115.00 GPa  
9
Bulk Modulus
47.60 GPa  
25
160.00 GPa  
11
Young's Modulus
68.60 GPa  
32
279.00 GPa  
8
Poisson Ratio
0.26  
21
0.21  
33
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.84  
99+
7.19  
99+
Magnetic Ordering
Paramagnetic  
Antiferromagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
17
Susceptibility
0.00  
14
0.00  
10
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
582.00 nΩ·m  
9
125.00 nΩ·m  
27
Electrical Conductivity
0.02 106/cm Ω  
99+
0.08 106/cm Ω  
30
Electron Affinity
50.00 kJ/mol  
26
64.30 kJ/mol  
17
Thermal
Specific Heat
0.15 J/(kg K)  
37
0.45 J/(kg K)  
12
Molar Heat Capacity
26.86 J/mol·K  
31
23.35 J/mol·K  
99+
Thermal Conductivity
16.40 W/m·K  
99+
93.90 W/m·K  
17
Critical Temperature
1,925.00 K  
23
1,907.00 K  
24
Thermal Expansion
9.90 µm/(m·K)  
99+
4.90 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
355.90 kJ/mol  
32
348.80 kJ/mol  
35
Enthalpy of Fusion
18.70 kJ/mol  
13
15.31 kJ/mol  
20
Enthalpy of Atomization
398.00 kJ/mol  
26
397.50 kJ/mol  
27
Standard Molar Entropy
51.00 J/mol.K  
99+
23.80 J/mol.K  
99+
Periodic Table >>
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