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Calcium vs Scandium

Calcium
Scandium
Scandium vs Calcium


Periodic Table
Symbol
Ca   
Sc   
Group Number
2   
16
3   
15
Period Number
4   
4   
Block
s block   
d block   
Element Family
Alkaline Earth   
Transition Metal   
CAS Number
7440702   
21
7440202   
99+
Space Group Name
Fm_ 3m   
P63/mmc   
Space Group Number
225.00   
2
194.00   
5
Facts
Interesting Facts
  • Calcium ranks 5th rank in the list of earth’s abundance Percentage.
  • It is found in the compound state.
  • Gypsum or calcium sulfate is used as plaster and plaster of paris.
  
  • Scandium is known as one of the rare earth elements.
  • Scandium metal found in rare minerals called Wolframite .
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
Found in Minerals, Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Humphry Davy   
Lars Fredrik Nilson   
Discovery
In 1808   
In 1879   
Abundance
  
  
Abundance In Universe
7 * 10-3 %   
3
3 * 10-6 %   
15
Abundance In Sun
~0.007 %   
4
~0.000004 %   
16
Abundance In Meteorites
1.10 %   
4
0.00 %   
18
Abundance In Earth's Crust
5.00 %   
3
0.00 %   
23
Abundance In Oceans
0.00 %   
5
0.00 %   
32
Abundance In Humans
1.40 %   
1
Not Available   
Uses
Uses & Benefits
  • It is used as a reducing agent while preparing metals like thorium and uranium. It is also used as an alloying agent for metals such as aluminum, copper & lead.
  • Calcium carbonate or lime stone is used in cement.
  
  • 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
Chemical Industry   
Electrical Industry, Electronic Industry   
Medical Uses
Dentistry, Pharmaceutical Industry   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
60.50 Blood/mg dm-3   
4
0.01 Blood/mg dm-3   
22
In Bone
170,000.00 p.p.m.   
1
0.00 p.p.m.   
34
Physical Properties
Melting Point
839.00 °C   
99+
1,539.00 °C   
24
Boiling Point
1,484.00 °C   
99+
2,832.00 °C   
35
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Silvery White   
Luster
NA   
Lustrous   
Hardness
  
  
Mohs Hardness
1.75   
17
Not Available   
Brinell Hardness
170.00 MPa   
99+
750.00 MPa   
12
Speed of Sound
3,810.00 m/s   
19
Not Available   
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
Ca   
Sc   
Isotopes
  
  
Known Isotopes
19   
20
13   
26
Electronegativity
  
  
Pauling Electronegativity
1.00   
99+
1.36   
29
Sanderson Electronegativity
0.95   
24
1.02   
21
Allred Rochow Electronegativity
1.04   
34
1.20   
27
Mulliken-Jaffe Electronegativity
1.08   
17
Not Available   
Allen Electronegativity
1.03   
39
1.19   
36
Electropositivity
  
  
Pauling Electropositivity
3.00   
9
2.64   
25
Ionization Energies
  
  
1st Energy Level
589.80 kJ/mol   
99+
633.10 kJ/mol   
99+
2nd Energy Level
1,145.40 kJ/mol   
99+
1,235.00 kJ/mol   
99+
3rd Energy Level
4,912.40 kJ/mol   
7
2,388.60 kJ/mol   
99+
4th Energy Level
6,491.00 kJ/mol   
7
7,090.60 kJ/mol   
6
5th Energy Level
8,153.00 kJ/mol   
7
8,843.00 kJ/mol   
6
6th Energy Level
10,496.00 kJ/mol   
8
10,679.00 kJ/mol   
7
7th Energy level
12,270.00 kJ/mol   
12
13,310.00 kJ/mol   
8
8th Energy Level
14,206.00 kJ/mol   
15
15,250.00 kJ/mol   
11
9th Energy Level
18,191.00 kJ/mol   
12
17,370.00 kJ/mol   
14
10th Energy Level
20,385.00 kJ/mol   
16
21,726.00 kJ/mol   
13
11th Energy Level
57,110.00 kJ/mol   
3
24,102.00 kJ/mol   
16
12th Energy Level
63,410.00 kJ/mol   
3
66,320.00 kJ/mol   
2
13th Energy Level
70,110.00 kJ/mol   
3
73,010.00 kJ/mol   
2
14th Energy Level
78,890.00 kJ/mol   
4
80,160.00 kJ/mol   
3
15th Energy Level
86,310.00 kJ/mol   
5
89,490.00 kJ/mol   
4
16th Energy Level
94,000.00 kJ/mol   
6
97,400.00 kJ/mol   
5
17th Energy Level
104,900.00 kJ/mol   
7
105,600.00 kJ/mol   
6
18th Energy Level
111,711.00 kJ/mol   
8
117,000.00 kJ/mol   
7
19th Energy Level
Not Available   
124,270.00 kJ/mol   
8
Electrochemical Equivalent
0.75 g/amp-hr   
99+
0.56 g/amp-hr   
99+
Electron Work Function
2.87 eV   
38
3.50 eV   
31
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility   
Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
20   
99+
21   
99+
Electron Configuration
[Ar] 4s2   
[Ar] 3d1 4s2   
Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
21   
99+
Number of Neutrons
20   
99+
24   
99+
Number of Electrons
20   
99+
21   
99+
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
162.00 pm   
26
Covalent Radius
176.00 pm   
22
170.00 pm   
25
Van der Waals Radius
231.00 pm   
19
211.00 pm   
25
Atomic Weight
40.08 amu   
99+
44.96 amu   
99+
Atomic Volume
29.90 cm3/mol   
7
15.00 cm3/mol   
34
Adjacent Atomic Numbers
  
  
Previous Element
Potassium
  
Calcium
  
Next Element
Scandium
  
Titanium
  
Valence Electron Potential
29.00 (-eV)   
99+
58.00 (-eV)   
24
Lattice Constant
558.84 pm   
9
330.90 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.59   
7
Mechanical Properties
Density
  
  
Density At Room Temperature
1.55 g/cm3   
99+
2.99 g/cm3   
99+
Density When Liquid (at m.p.)
1.38 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
25.50 (Pa)   
3
0.00 (Pa)   
22
Vapor Pressure at 2000 K
Not Available   
91.30 (Pa)   
3
Elasticity properties
  
  
Shear Modulus
7.40 GPa   
99+
29.10 GPa   
24
Bulk Modulus
17.00 GPa   
99+
56.60 GPa   
21
Young's Modulus
20.00 GPa   
99+
74.40 GPa   
26
Poisson Ratio
0.31   
13
0.28   
18
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
4.58   
99+
2.99   
99+
Magnetic Ordering
Diamagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
33.60 nΩ·m   
99+
562.00 nΩ·m   
10
Electrical Conductivity
0.30 106/cm Ω   
6
0.02 106/cm Ω   
99+
Electron Affinity
2.37 kJ/mol   
39
18.10 kJ/mol   
33
Thermal Properties
Specific Heat
0.63 J/(kg K)   
7
0.60 J/(kg K)   
8
Molar Heat Capacity
25.93 J/mol·K   
34
25.52 J/mol·K   
37
Thermal Conductivity
201.00 W/m·K   
5
15.80 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
22.30 µm/(m·K)   
19
10.20 µm/(m·K)   
39
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol   
99+
314.20 kJ/mol   
28
Enthalpy of Fusion
8.54 kJ/mol   
99+
14.10 kJ/mol   
25
Enthalpy of Atomization
184.00 kJ/mol   
99+
343.00 kJ/mol   
28
Standard Molar Entropy
41.60 J/mol.K   
36
34.60 J/mol.K   
99+
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