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Scandium Magnesium Comparison

Scandium
Magnesium
Magnesium Scandium comparison


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