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Magnesium vs Scandium

Magnesium
Scandium
Scandium vs Magnesium


Periodic Table
Symbol
Mg  
Sc  
Group Number
2  
16
3  
15
Period Number
3  
4  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7439954  
99+
7440202  
99+
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
5
194.00  
5
Facts
Interesting Facts
  • Magnesium ions are present in every chlorophyll of every green plant .
  • Controlling Magnesium fire by pouring water on it will result in explosions.
  
  • Scandium is known as one of the rare earth elements.
  • Scandium metal found in rare minerals called Wolframite .
  
Sources
By Electrolysis Process, In Ocean, Mining  
Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Joseph Black  
Lars Fredrik Nilson  
Discovery
In 1755  
In 1879  
Abundance
  
  
Abundance In Universe
6 * 10-2 %  
2
3 * 10-6 %  
15
Abundance In Sun
~0.07 %  
2
~0.000004 %  
16
Abundance In Meteorites
12.00 %  
2
0.00 %  
18
Abundance In Earth's Crust
2.90 %  
4
0.00 %  
23
Abundance In Oceans
0.13 %  
2
0.00 %  
32
Abundance In Humans
0.03 %  
4
Not Available  
Uses
Uses & Benefits
  • Magnesium aluminum alloy improves the mechanical strength and welding characteristics and hence it is used in aeroplane and car manufacturing.
  • It is also used to remove sulfur from the molten iron and steel.
  
  • 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, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry  
Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Surgical Instruments Manufacturing  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
37.80 Blood/mg dm-3  
5
0.01 Blood/mg dm-3  
22
In Bone
1,800.00 p.p.m.  
4
0.00 p.p.m.  
34
Physical Properties
Melting Point
650.00 °C  
99+
1,539.00 °C  
24
Boiling Point
1,107.00 °C  
99+
2,832.00 °C  
35
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery White  
Luster
NA  
Lustrous  
Hardness
  
  
Mohs Hardness
2.50  
14
Not Available  
Brinell Hardness
260.00 MPa  
36
750.00 MPa  
12
Speed of Sound
4,940.00 m/s  
11
Not Available  
Optical Properties
  
  
Reflectivity
74.00 %  
7
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
Mg  
Sc  
Isotopes
  
  
Known Isotopes
15  
24
13  
26
Electronegativity
  
  
Pauling Electronegativity
1.31  
31
1.36  
29
Sanderson Electronegativity
1.32  
18
1.02  
21
Allred Rochow Electronegativity
1.23  
25
1.20  
27
Mulliken-Jaffe Electronegativity
1.37  
16
Not Available  
Allen Electronegativity
1.29  
35
1.19  
36
Electropositivity
  
  
Pauling Electropositivity
2.69  
23
2.64  
25
Ionization Energies
  
  
1st Energy Level
737.70 kJ/mol  
24
633.10 kJ/mol  
99+
2nd Energy Level
1,450.70 kJ/mol  
99+
1,235.00 kJ/mol  
99+
3rd Energy Level
7,732.70 kJ/mol  
5
2,388.60 kJ/mol  
99+
4th Energy Level
10,542.50 kJ/mol  
4
7,090.60 kJ/mol  
6
5th Energy Level
13,630.00 kJ/mol  
3
8,843.00 kJ/mol  
6
6th Energy Level
18,020.00 kJ/mol  
3
10,679.00 kJ/mol  
7
7th Energy level
21,711.00 kJ/mol  
3
13,310.00 kJ/mol  
8
8th Energy Level
25,661.00 kJ/mol  
3
15,250.00 kJ/mol  
11
9th Energy Level
31,653.00 kJ/mol  
3
17,370.00 kJ/mol  
14
10th Energy Level
35,458.00 kJ/mol  
5
21,726.00 kJ/mol  
13
11th Energy Level
169,988.00 kJ/mol  
1
24,102.00 kJ/mol  
16
12th Energy Level
189,368.00 kJ/mol  
1
66,320.00 kJ/mol  
2
13th Energy Level
Not Available  
73,010.00 kJ/mol  
2
14th Energy Level
Not Available  
80,160.00 kJ/mol  
3
15th Energy Level
Not Available  
89,490.00 kJ/mol  
4
16th Energy Level
Not Available  
97,400.00 kJ/mol  
5
17th Energy Level
Not Available  
105,600.00 kJ/mol  
6
18th Energy Level
Not Available  
117,000.00 kJ/mol  
7
19th Energy Level
Not Available  
124,270.00 kJ/mol  
8
Electrochemical Equivalent
0.45 g/amp-hr  
99+
0.56 g/amp-hr  
99+
Electron Work Function
3.66 eV  
29
3.50 eV  
31
Other Chemical Properties
Corrosion, Highly Inflammable, Ionization, Solubility  
Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
12  
99+
21  
99+
Electron Configuration
[Ne] 3s2  
[Ar] 3d1 4s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Magnesium.jpg#100  
HCP-Crystal-Structure-of-Scandium.jpg#100  
Atom
  
  
Number of Protons
12  
99+
21  
99+
Number of Neutrons
12  
99+
24  
99+
Number of Electrons
12  
99+
21  
99+
Radius of an Atom
  
  
Atomic Radius
160.00 pm  
27
162.00 pm  
26
Covalent Radius
141.00 pm  
99+
170.00 pm  
25
Van der Waals Radius
173.00 pm  
37
211.00 pm  
25
Atomic Weight
24.31 amu  
99+
44.96 amu  
99+
Atomic Volume
13.97 cm3/mol  
37
15.00 cm3/mol  
34
Adjacent Atomic Numbers
  
  
Previous Element
Sodium
  
Calcium
  
Next Element
Aluminium
  
Titanium
  
Valence Electron Potential
40.00 (-eV)  
99+
58.00 (-eV)  
24
Lattice Constant
320.94 pm  
99+
330.90 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.59  
7
Mechanical Properties
Density
  
  
Density At Room Temperature
1.74 g/cm3  
99+
2.99 g/cm3  
99+
Density When Liquid (at m.p.)
1.58 g/cm3  
99+
2.80 g/cm3  
99+
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available  
0.00 (Pa)  
22
Vapor Pressure at 2000 K
Not Available  
91.30 (Pa)  
3
Elasticity properties
  
  
Shear Modulus
17.00 GPa  
37
29.10 GPa  
24
Bulk Modulus
45.00 GPa  
25
56.60 GPa  
21
Young's Modulus
45.00 GPa  
39
74.40 GPa  
26
Poisson Ratio
0.29  
15
0.28  
18
Other Mechanical Properties
NA  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
1.74  
99+
2.99  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
43.90 nΩ·m  
99+
562.00 nΩ·m  
10
Electrical Conductivity
0.23 106/cm Ω  
7
0.02 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
40
18.10 kJ/mol  
33
Thermal Properties
Specific Heat
1.02 J/(kg K)  
4
0.60 J/(kg K)  
8
Molar Heat Capacity
24.87 J/mol·K  
99+
25.52 J/mol·K  
37
Thermal Conductivity
156.00 W/m·K  
8
15.80 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
24.80 µm/(m·K)  
15
10.20 µm/(m·K)  
39
Enthalpy
  
  
Enthalpy of Vaporization
128.70 kJ/mol  
99+
314.20 kJ/mol  
28
Enthalpy of Fusion
8.95 kJ/mol  
39
14.10 kJ/mol  
25
Enthalpy of Atomization
148.50 kJ/mol  
99+
343.00 kJ/mol  
28
Standard Molar Entropy
32.70 J/mol.K  
99+
34.60 J/mol.K  
99+
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