Magnesium vs Curium
Periodic Table
Symbol
Mg
Cm
Group Number
2
16
Not Available
Period Number
3
7
Block
s block
f block
Element Family
Alkaline Earth
Actinide
CAS Number
7439954
99+
7440519
36
Space Group Name
P63/mmc
Not Available
Space Group Number
194.00
5
Not Available
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.
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
Sources
By Electrolysis Process, In Ocean, Mining
Bombarding Plutonium with Helium Ions
History
Who Discovered
Joseph Black
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Discovery
In 1755
In 1944
Abundance
Abundance In Universe
6 * 10-2 %
2
Not Available
Abundance In Sun
~0.07 %
2
~-9999 %
Abundance In Meteorites
12.00 %
2
Not Available
Abundance In Earth's Crust
2.90 %
4
Not Available
Abundance In Oceans
0.13 %
2
Not Available
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.
- Curium metal is used to provide power to electrical equipment for space missions.
Industrial Uses
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry
NA
Medical Uses
NA
NA
Other Uses
Surgical Instruments Manufacturing
Research Purposes
Biological Properties
Toxicity
Non Toxic
Unknown
Present in Human Body
Yes
No
In Blood
37.80 Blood/mg dm-3
5
0.00 Blood/mg dm-3
37
In Bone
1,800.00 p.p.m.
4
0.00 p.p.m.
36
Physical Properties
Melting Point
650.00 °C
99+
1,340.00 °C
34
Boiling Point
1,107.00 °C
99+
3,110.00 °C
30
Appearance
Physical State
Solid
Solid
Color
Gray
Silver
Luster
NA
Metallic
Hardness
Mohs Hardness
2.50
14
Not Available
Brinell Hardness
260.00 MPa
36
Not Available
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
Cm
Isotopes
Known Isotopes
15
24
15
24
Electronegativity
Pauling Electronegativity
1.31
31
1.30
32
Sanderson Electronegativity
1.32
18
Not Available
Allred Rochow Electronegativity
1.23
25
1.20
27
Mulliken-Jaffe Electronegativity
1.37
16
Not Available
Allen Electronegativity
1.29
35
Not Available
Electropositivity
Pauling Electropositivity
2.69
23
2.70
22
Ionization Energies
1st Energy Level
737.70 kJ/mol
24
581.00 kJ/mol
99+
2nd Energy Level
1,450.70 kJ/mol
99+
1,196.00 kJ/mol
99+
3rd Energy Level
7,732.70 kJ/mol
5
2,026.00 kJ/mol
99+
4th Energy Level
10,542.50 kJ/mol
4
3,550.00 kJ/mol
99+
5th Energy Level
13,630.00 kJ/mol
3
Not Available
6th Energy Level
18,020.00 kJ/mol
3
Not Available
7th Energy level
21,711.00 kJ/mol
3
Not Available
8th Energy Level
25,661.00 kJ/mol
3
Not Available
9th Energy Level
31,653.00 kJ/mol
3
Not Available
10th Energy Level
35,458.00 kJ/mol
5
Not Available
11th Energy Level
169,988.00 kJ/mol
1
Not Available
12th Energy Level
189,368.00 kJ/mol
1
Not Available
Electrochemical Equivalent
0.45 g/amp-hr
99+
3.07 g/amp-hr
16
Electron Work Function
3.66 eV
29
Not Available
Other Chemical Properties
Corrosion, Highly Inflammable, Ionization, Solubility
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
12
99+
96
22
Electron Configuration
[Ne] 3s2
[Rn] 5f7 6d1 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
HCP-Crystal-Structure-of-Magnesium.jpg#100
DHCP-Crystal-Structure-of-Curium.jpg#100
Atom
Number of Protons
12
99+
96
22
Number of Neutrons
12
99+
151
10
Number of Electrons
12
99+
96
22
Radius of an Atom
Atomic Radius
160.00 pm
27
174.00 pm
20
Covalent Radius
141.00 pm
99+
169.00 pm
26
Van der Waals Radius
173.00 pm
37
200.00 pm
28
Atomic Weight
24.31 amu
99+
247.00 amu
18
Atomic Volume
13.97 cm3/mol
37
18.28 cm3/mol
26
Adjacent Atomic Numbers
Valence Electron Potential
40.00 (-eV)
99+
44.50 (-eV)
38
Lattice Constant
320.94 pm
99+
Not Available
Lattice Angles
π/2, π/2, 2 π/3
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
1.74 g/cm3
99+
13.51 g/cm3
25
Density When Liquid (at m.p.)
1.58 g/cm3
99+
13.85 g/cm3
10
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Shear Modulus
17.00 GPa
37
Not Available
Bulk Modulus
45.00 GPa
25
Not Available
Young's Modulus
45.00 GPa
39
Not Available
Poisson Ratio
0.29
15
Not Available
Other Mechanical Properties
NA
Unknown
Magnetic Properties
Magnetic Characteristics
Specific Gravity
1.74
99+
13.51
17
Magnetic Ordering
Paramagnetic
Antiferromagnetic
Electrical Properties
Electrical Property
Conductor
Unknown
Resistivity
43.90 nΩ·m
99+
1.25 nΩ·m
99+
Electrical Conductivity
0.23 106/cm Ω
7
Not Available
Electron Affinity
0.00 kJ/mol
40
Not Available
Thermal Properties
Specific Heat
1.02 J/(kg K)
4
Not Available
Molar Heat Capacity
24.87 J/mol·K
99+
Not Available
Thermal Conductivity
156.00 W/m·K
8
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
24.80 µm/(m·K)
15
Not Available
Enthalpy
Enthalpy of Vaporization
128.70 kJ/mol
99+
Not Available
Enthalpy of Fusion
8.95 kJ/mol
39
15.00 kJ/mol
21
Enthalpy of Atomization
148.50 kJ/mol
99+
Not Available
Standard Molar Entropy
32.70 J/mol.K
99+
Not Available
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