Manganese Calcium Comparison
Periodic Table
Symbol
Mn
Ca
Group Number
7
11
2
16
Period Number
4
4
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
7439965
99+
7440702
21
Space Group Name
I_ 43m
Fm_ 3m
Space Group Number
217.00
4
225.00
2
Facts
Interesting Facts
- Manganese is an essential trace element in all forms of life.
- Manganese metal oxidizes very easily, but it does not fuse that easily.
- 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.
Sources
Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Johann Gottlieb Gahn
Humphry Davy
Discovery
In 1774
In 1808
Abundance
Abundance In Universe
8 * 10-4 %
8
7 * 10-3 %
3
Abundance In Sun
~0.001 %
8
~0.007 %
4
Abundance In Meteorites
0.27 %
8
1.10 %
4
Abundance In Earth's Crust
0.11 %
8
5.00 %
3
Abundance In Oceans
0.00 %
13
0.00 %
5
Abundance In Humans
0.00 %
13
1.40 %
1
Uses
Uses & Benefits
- This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
- Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
- 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.
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Chemical Industry
Medical Uses
NA
Dentistry, Pharmaceutical Industry
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Non Toxic
Present in Human Body
Yes
Yes
In Blood
0.08 Blood/mg dm-3
14
60.50 Blood/mg dm-3
4
In Bone
100.00 p.p.m.
8
170,000.00 p.p.m.
1
Physical Properties
Melting Point
1,245.00 °C
37
839.00 °C
99+
Boiling Point
1,962.00 °C
99+
1,484.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silver
Gray
Luster
Metallic
NA
Hardness
Mohs Hardness
6.00
6
1.75
17
Brinell Hardness
196.00 MPa
99+
170.00 MPa
99+
Speed of Sound
5,150.00 m/s
7
3,810.00 m/s
19
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
Mn
Ca
Isotopes
Known Isotopes
21
18
19
20
Electronegativity
Pauling Electronegativity
1.55
25
1.00
99+
Sanderson Electronegativity
2.20
7
0.95
24
Allred Rochow Electronegativity
1.60
9
1.04
34
Mulliken-Jaffe Electronegativity
Not Available
1.08
17
Allen Electronegativity
1.75
15
1.03
39
Electropositivity
Pauling Electropositivity
2.45
29
3.00
9
Ionization Energies
1st Energy Level
717.30 kJ/mol
30
589.80 kJ/mol
99+
2nd Energy Level
1,509.00 kJ/mol
39
1,145.40 kJ/mol
99+
3rd Energy Level
3,248.00 kJ/mol
21
4,912.40 kJ/mol
7
4th Energy Level
4,940.00 kJ/mol
20
6,491.00 kJ/mol
7
5th Energy Level
6,990.00 kJ/mol
17
8,153.00 kJ/mol
7
6th Energy Level
9,220.00 kJ/mol
16
10,496.00 kJ/mol
8
7th Energy level
11,500.00 kJ/mol
16
12,270.00 kJ/mol
12
8th Energy Level
18,770.00 kJ/mol
5
14,206.00 kJ/mol
15
9th Energy Level
21,400.00 kJ/mol
6
18,191.00 kJ/mol
12
10th Energy Level
23,960.00 kJ/mol
9
20,385.00 kJ/mol
16
11th Energy Level
27,590.00 kJ/mol
10
57,110.00 kJ/mol
3
12th Energy Level
30,330.00 kJ/mol
10
63,410.00 kJ/mol
3
13th Energy Level
33,150.00 kJ/mol
11
70,110.00 kJ/mol
3
14th Energy Level
38,880.00 kJ/mol
10
78,890.00 kJ/mol
4
15th Energy Level
41,987.00 kJ/mol
13
86,310.00 kJ/mol
5
16th Energy Level
109,480.00 kJ/mol
1
94,000.00 kJ/mol
6
17th Energy Level
118,100.00 kJ/mol
2
104,900.00 kJ/mol
7
18th Energy Level
127,100.00 kJ/mol
3
111,711.00 kJ/mol
8
19th Energy Level
138,600.00 kJ/mol
4
Not Available
20th Energy Level
148,500.00 kJ/mol
6
Not Available
21st Energy Level
158,600.00 kJ/mol
6
Not Available
22nd Energy Level
172,500.00 kJ/mol
5
Not Available
23rd Energy Level
181,380.00 kJ/mol
5
Not Available
Electrochemical Equivalent
0.29 g/amp-hr
99+
0.75 g/amp-hr
99+
Electron Work Function
4.10 eV
25
2.87 eV
38
Other Chemical Properties
Ionization, Radioactive Isotopes
Chemical Stability, Flammability, Ionization, Solubility
Atomic Properties
Atomic Number
25
99+
20
99+
Electron Configuration
[Ar] 3d5 4s2
[Ar] 4s2
Crystal Structure
Body Centered Cubic (BCC)
Face Centered Cubic (FCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
FCC-Crystal-Structure-of-Calcium.jpg#100
Atom
Number of Protons
25
99+
20
99+
Number of Neutrons
30
99+
20
99+
Number of Electrons
25
99+
20
99+
Radius of an Atom
Atomic Radius
127.00 pm
99+
197.00 pm
6
Covalent Radius
139.00 pm
99+
176.00 pm
22
Van der Waals Radius
200.00 pm
28
231.00 pm
19
Atomic Weight
54.94 amu
99+
40.08 amu
99+
Atomic Volume
1.39 cm3/mol
99+
29.90 cm3/mol
7
Adjacent Atomic Numbers
Valence Electron Potential
220.00 (-eV)
2
29.00 (-eV)
99+
Lattice Constant
891.25 pm
1
558.84 pm
9
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
7.21 g/cm3
99+
1.55 g/cm3
99+
Density When Liquid (at m.p.)
5.95 g/cm3
99+
1.38 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
12
25.50 (Pa)
3
Elasticity properties
Shear Modulus
Not Available
7.40 GPa
99+
Bulk Modulus
120.00 GPa
14
17.00 GPa
99+
Young's Modulus
198.00 GPa
12
20.00 GPa
99+
Poisson Ratio
Not Available
0.31
13
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
7.21
99+
4.58
99+
Magnetic Ordering
Paramagnetic
Diamagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
1.44 nΩ·m
99+
33.60 nΩ·m
99+
Electrical Conductivity
0.01 106/cm Ω
99+
0.30 106/cm Ω
6
Electron Affinity
0.00 kJ/mol
40
2.37 kJ/mol
39
Thermal Properties
Specific Heat
0.48 J/(kg K)
11
0.63 J/(kg K)
7
Molar Heat Capacity
26.32 J/mol·K
29
25.93 J/mol·K
34
Thermal Conductivity
7.81 W/m·K
99+
201.00 W/m·K
5
Critical Temperature
Not Available
Not Available
Thermal Expansion
21.70 µm/(m·K)
21
22.30 µm/(m·K)
19
Enthalpy
Enthalpy of Vaporization
219.70 kJ/mol
99+
150.00 kJ/mol
99+
Enthalpy of Fusion
14.64 kJ/mol
23
8.54 kJ/mol
99+
Enthalpy of Atomization
280.30 kJ/mol
38
184.00 kJ/mol
99+
Standard Molar Entropy
32.00 J/mol.K
99+
41.60 J/mol.K
36
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