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Indium vs Scandium

Indium
Scandium
Scandium vs Indium


Periodic Table
Symbol
In  
Sc  
Group Number
13  
5
3  
15
Period Number
5  
4  
Block
p block  
d block  
Element Family
Post-​Transition  
Transition Metal  
CAS Number
7440746  
17
7440202  
99+
Space Group Name
I4/mmm  
P63/mmc  
Space Group Number
139.00  
11
194.00  
7
Facts
Interesting Facts
  • Luster of Indium is bright in nature.
  • Reich and richer were looking for thallium in zinc metal and they discovered Indium metal.
  
  • Scandium is known as one of the rare earth elements.
  • Scandium metal found in rare minerals called Wolframite .
  
Sources
Mining, Ores of metals  
Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Ferdinand Reich and Hieronymous Theodor Richter  
Lars Fredrik Nilson  
Discovery
In 1863  
In 1879  
Abundance
  
  
Abundance In Universe
0.00 %  
29
0.00 %  
16
Abundance In Sun
0.00 %  
23
0.00 %  
16
Abundance In Meteorites
0.00 %  
99+
0.00 %  
18
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
23
Abundance In Oceans
0.00 %  
99+
0.00 %  
32
Abundance In Humans
0.00 %  
16
0.00 %  
24
Uses
Uses & Benefits
  • It is used to produce indium tin oxide (ITO), it is used in manufacturing touch screens, flat screen TVs and solar panels.
  • Its nitride, phosphide and antimonide are used in transistors and microchips.
  
  • Uses of Scandium are limited to research purpose only. However, it has very low density and higher melting point.
  • Its compounds like scandium iodide is used in mercury vapor lamps to produce very bright white light.
  
Industrial Uses
Aerospace Industry, Automobile Industry  
Electrical Industry, Electronic Industry  
Medical Uses
Medical Research  
-  
Other Uses
Alloys, In Nuclear Reactors  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.01 Blood/mg dm-3  
22
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
39
Physical
Melting Point
156.61 °C  
99+
1,539.00 °C  
24
Boiling Point
2,000.00 °C  
99+
2,832.00 °C  
36
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gray  
Silvery White  
Luster
Lustrous  
Lustrous  
Hardness
  
  
Mohs Hardness
1.20  
21
5.50  
7
Brinell Hardness
8.80 MPa  
99+
750.00 MPa  
13
Vickers Hardness
0.01 MPa  
99+
1,200.00 MPa  
13
Speed of Sound
1,215.00 m/s  
99+
6,100.00 m/s  
5
Optical Properties
  
  
Refractive Index
3.41  
1
1.80  
21
Reflectivity
83.00 %  
6
93.00 %  
3
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
In  
Sc  
Isotopes
  
  
Known Isotopes
35  
4
13  
26
Electronegativity
  
  
Pauling Electronegativity
1.78  
17
1.36  
30
Sanderson Electronegativity
2.14  
9
1.02  
40
Allred Rochow Electronegativity
1.49  
14
1.20  
28
Mulliken-Jaffe Electronegativity
1.76  
18
1.36  
31
Allen Electronegativity
1.66  
21
1.19  
99+
Electropositivity
  
  
Pauling Electropositivity
2.22  
38
2.64  
25
Ionization Energies
  
  
1st Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
99+
2nd Energy Level
1,820.70 kJ/mol  
19
1,235.00 kJ/mol  
99+
3rd Energy Level
2,704.00 kJ/mol  
40
2,388.60 kJ/mol  
99+
4th Energy Level
5,210.00 kJ/mol  
26
7,090.60 kJ/mol  
13
5th Energy Level
5,580.00 kJ/mol  
99+
8,843.00 kJ/mol  
7
6th Energy Level
5,580.00 kJ/mol  
99+
10,679.00 kJ/mol  
13
7th Energy level
5,580.00 kJ/mol  
99+
13,310.00 kJ/mol  
8
8th Energy Level
5,580.00 kJ/mol  
99+
15,250.00 kJ/mol  
11
9th Energy Level
5,580.00 kJ/mol  
99+
17,370.00 kJ/mol  
14
10th Energy Level
5,580.00 kJ/mol  
99+
21,726.00 kJ/mol  
13
11th Energy Level
5,580.00 kJ/mol  
99+
24,102.00 kJ/mol  
16
12th Energy Level
5,580.00 kJ/mol  
99+
66,320.00 kJ/mol  
7
13th Energy Level
5,580.00 kJ/mol  
99+
73,010.00 kJ/mol  
2
14th Energy Level
558.30 kJ/mol  
99+
80,160.00 kJ/mol  
3
15th Energy Level
55,800.00 kJ/mol  
99+
89,490.00 kJ/mol  
6
16th Energy Level
558.30 kJ/mol  
99+
97,400.00 kJ/mol  
5
17th Energy Level
558.30 kJ/mol  
99+
105,600.00 kJ/mol  
6
18th Energy Level
5,580.00 kJ/mol  
99+
117,000.00 kJ/mol  
7
19th Energy Level
558.30 kJ/mol  
99+
124,270.00 kJ/mol  
8
20th Energy Level
558.00 kJ/mol  
99+
633.00 kJ/mol  
99+
21st Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
99+
22nd Energy Level
558.00 kJ/mol  
99+
633.00 kJ/mol  
35
23rd Energy Level
5,581.00 kJ/mol  
24
633.10 kJ/mol  
99+
24th Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
37
25th Energy Level
558.00 kJ/mol  
99+
633.00 kJ/mol  
39
26th Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
38
27th Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
40
28th Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
99+
29th Energy Level
558.30 kJ/mol  
99+
633.10 kJ/mol  
99+
30th Energy Level
558.00 kJ/mol  
99+
633.00 kJ/mol  
99+
Electrochemical Equivalent
1.43 g/amp-hr  
99+
0.56 g/amp-hr  
99+
Electron Work Function
4.12 eV  
31
3.50 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
49  
99+
21  
99+
Electron Configuration
[Kr] 4d10 5s2 5p1  
[Ar] 3d1 4s2  
Crystal Structure
Tetragonal (TETR)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
TETR-Crystal-Structure-of-Indium.jpg#100  
HCP-Crystal-Structure-of-Scandium.jpg#100  
Atom
  
  
Number of Protons
49  
99+
21  
99+
Number of Neutrons
66  
99+
24  
99+
Number of Electrons
49  
99+
21  
99+
Radius of an Atom
  
  
Atomic Radius
167.00 pm  
26
162.00 pm  
28
Covalent Radius
142.00 pm  
99+
170.00 pm  
27
Van der Waals Radius
193.00 pm  
38
211.00 pm  
32
Atomic Weight
114.82 amu  
99+
44.96 amu  
99+
Atomic Volume
15.70 cm3/mol  
99+
15.00 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cadmium
  
Calcium
  
Next Element
Tin
  
Titanium
  
Valence Electron Potential
54.00 (-eV)  
26
58.00 (-eV)  
25
Lattice Constant
325.23 pm  
99+
330.90 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.56  
99+
1.59  
24
Mechanical
Density
  
  
Density At Room Temperature
7.31 g/cm3  
99+
2.99 g/cm3  
99+
Density When Liquid (at m.p.)
7.02 g/cm3  
99+
2.80 g/cm3  
99+
Tensile Strength
2.50 MPa  
99+
150.00 MPa  
25
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.01 (Pa)  
11
0.00 (Pa)  
24
Vapor Pressure at 2000 K
0.00 (Pa)  
24
91.30 (Pa)  
3
Elasticity properties
  
  
Shear Modulus
18.00 GPa  
99+
29.10 GPa  
28
Bulk Modulus
46.90 GPa  
27
56.60 GPa  
22
Young's Modulus
11.00 GPa  
99+
74.40 GPa  
28
Poisson Ratio
0.44  
3
0.28  
18
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
7.31  
99+
2.99  
99+
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
8
Susceptibility
0.00  
34
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
83.70 nΩ·m  
34
562.00 nΩ·m  
10
Electrical Conductivity
0.12 106/cm Ω  
20
0.02 106/cm Ω  
99+
Electron Affinity
28.90 kJ/mol  
37
18.10 kJ/mol  
39
Thermal
Specific Heat
0.23 J/(kg K)  
27
0.60 J/(kg K)  
8
Molar Heat Capacity
26.74 J/mol·K  
32
25.52 J/mol·K  
99+
Thermal Conductivity
81.80 W/m·K  
21
15.80 W/m·K  
99+
Critical Temperature
429.75 K  
99+
1,814.00 K  
28
Thermal Expansion
32.10 µm/(m·K)  
9
10.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
226.40 kJ/mol  
99+
314.20 kJ/mol  
99+
Enthalpy of Fusion
3.28 kJ/mol  
99+
14.10 kJ/mol  
29
Enthalpy of Atomization
242.70 kJ/mol  
99+
343.00 kJ/mol  
38
Standard Molar Entropy
57.80 J/mol.K  
27
34.60 J/mol.K  
99+
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