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Yttrium vs Chromium

Yttrium
Chromium
Chromium vs Yttrium


Periodic Table
Symbol
Y   
Cr   
Group Number
3   
15
6   
12
Period Number
5   
4   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440655   
25
7440473   
39
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
  • 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
Johan Gadolin   
Louis Nicolas Vauquelin   
Discovery
In 1794   
In Between 1797 - 1798   
Abundance
  
  
Abundance In Universe
7 * 10-7 %   
17
1.5 * 10-3 %   
7
Abundance In Sun
~0.0000001 %   
26
~0.002 %   
7
Abundance In Meteorites
0.00 %   
21
0.30 %   
7
Abundance In Earth's Crust
0.00 %   
22
0.01 %   
13
Abundance In Oceans
0.00 %   
25
0.00 %   
16
Abundance In Humans
Not Available   
0.00 %   
16
Uses
Uses & Benefits
  • 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.
  
  • 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
Electrical Industry, Electronic Industry   
Automobile Industry, Chemical Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Highly Toxic   
Highly Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.00 Blood/mg dm-3   
26
0.11 Blood/mg dm-3   
12
In Bone
0.07 p.p.m.   
25
0.33 p.p.m.   
21
Physical Properties
Melting Point
1,523.00 °C   
27
1,857.00 °C   
14
Boiling Point
3,337.00 °C   
21
2,672.00 °C   
39
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silver   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
8.50   
1
Brinell Hardness
589.00 MPa   
22
687.00 MPa   
16
Vickers Hardness
Not Available   
1,060.00 MPa   
10
Speed of Sound
3,300.00 m/s   
23
5,940.00 m/s   
5
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
Y   
Cr   
Isotopes
  
  
Known Isotopes
19   
20
21   
18
Electronegativity
  
  
Pauling Electronegativity
1.22   
38
1.66   
18
Sanderson Electronegativity
0.65   
29
1.66   
14
Allred Rochow Electronegativity
1.11   
29
1.56   
10
Allen Electronegativity
1.12   
38
1.65   
19
Electropositivity
  
  
Pauling Electropositivity
2.78   
16
2.34   
36
Ionization Energies
  
  
1st Energy Level
600.00 kJ/mol   
99+
26,130.00 kJ/mol   
1
2nd Energy Level
1,180.00 kJ/mol   
99+
28,750.00 kJ/mol   
1
3rd Energy Level
1,980.00 kJ/mol   
99+
34,230.00 kJ/mol   
1
4th Energy Level
5,847.00 kJ/mol   
10
37,066.00 kJ/mol   
1
5th Energy Level
7,430.00 kJ/mol   
14
97,510.00 kJ/mol   
1
6th Energy Level
8,970.00 kJ/mol   
17
105,800.00 kJ/mol   
1
7th Energy level
11,190.00 kJ/mol   
18
114,300.00 kJ/mol   
1
8th Energy Level
12,450.00 kJ/mol   
18
125,300.00 kJ/mol   
1
9th Energy Level
14,110.00 kJ/mol   
19
134,700.00 kJ/mol   
1
10th Energy Level
18,400.00 kJ/mol   
17
144,300.00 kJ/mol   
1
11th Energy Level
19,900.00 kJ/mol   
18
26,130.00 kJ/mol   
12
12th Energy Level
36,090.00 kJ/mol   
5
28,750.00 kJ/mol   
13
13th Energy Level
Not Available   
34,230.00 kJ/mol   
10
14th Energy Level
Not Available   
37,066.00 kJ/mol   
12
15th Energy Level
Not Available   
97,510.00 kJ/mol   
1
16th Energy Level
Not Available   
105,800.00 kJ/mol   
2
17th Energy Level
Not Available   
114,300.00 kJ/mol   
3
18th Energy Level
Not Available   
125,300.00 kJ/mol   
4
19th Energy Level
Not Available   
134,700.00 kJ/mol   
5
20th Energy Level
Not Available   
144,300.00 kJ/mol   
7
21st Energy Level
Not Available   
157,700.00 kJ/mol   
7
22nd Energy Level
Not Available   
166,090.00 kJ/mol   
6
Electrochemical Equivalent
1.11 g/amp-hr   
99+
0.32 g/amp-hr   
99+
Electron Work Function
3.10 eV   
35
4.50 eV   
14
Other Chemical Properties
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
39   
99+
24   
99+
Electron Configuration
[Kr] 4d1 5s2   
[Ar] 3d5 4s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Yttrium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
39   
99+
24   
99+
Number of Neutrons
50   
99+
28   
99+
Number of Electrons
39   
99+
24   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
128.00 pm   
99+
Covalent Radius
190.00 pm   
18
139.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
88.91 amu   
99+
52.00 amu   
99+
Atomic Volume
19.80 cm3/mol   
21
7.23 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Strontium
  
Vanadium
  
Next Element
Zirconium
  
Manganese
  
Valence Electron Potential
48.00 (-eV)   
30
170.00 (-eV)   
4
Lattice Constant
364.74 pm   
31
291.00 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.57   
16
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
4.47 g/cm3   
99+
7.19 g/cm3   
99+
Density When Liquid (at m.p.)
4.24 g/cm3   
99+
6.30 g/cm3   
40
Tensile Strength
Not Available   
689.00 MPa   
7
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
32
0.00 (Pa)   
24
Vapor Pressure at 2000 K
4.27 (Pa)   
10
774.00 (Pa)   
1
Elasticity properties
  
  
Shear Modulus
25.60 GPa   
30
115.00 GPa   
9
Bulk Modulus
41.20 GPa   
30
160.00 GPa   
11
Young's Modulus
63.50 GPa   
32
279.00 GPa   
8
Poisson Ratio
0.24   
26
0.21   
32
Other Mechanical Properties
Ductile   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
4.47   
99+
7.19   
99+
Magnetic Ordering
Paramagnetic   
Antiferromagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
NA   
Resistivity
596.00 nΩ·m   
8
125.00 nΩ·m   
27
Electrical Conductivity
0.02 106/cm Ω   
99+
0.08 106/cm Ω   
25
Electron Affinity
29.60 kJ/mol   
30
64.30 kJ/mol   
15
Thermal Properties
Specific Heat
0.30 J/(kg K)   
18
0.45 J/(kg K)   
12
Molar Heat Capacity
26.53 J/mol·K   
27
23.35 J/mol·K   
99+
Thermal Conductivity
17.20 W/m·K   
99+
93.90 W/m·K   
17
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
10.60 µm/(m·K)   
37
4.90 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
393.00 kJ/mol   
18
348.80 kJ/mol   
24
Enthalpy of Fusion
17.15 kJ/mol   
16
15.31 kJ/mol   
20
Enthalpy of Atomization
418.00 kJ/mol   
18
397.50 kJ/mol   
21
Standard Molar Entropy
44.40 J/mol.K   
33
23.80 J/mol.K   
99+
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