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Beryllium vs Curium

Beryllium
Curium
Curium vs Beryllium


Periodic Table
Symbol
Be  
Cm  
Group Number
2  
16
Not Available  
Period Number
2  
7  
Block
s block  
f block  
Element Family
Alkaline Earth  
Actinide  
CAS Number
7440417  
99+
7440519  
36
Space Group Name
P63/mmc  
Not Available  
Space Group Number
194.00  
5
Not Available  
Facts
Interesting Facts
  • Beryllium is best anti corrosion metal.
  • Beryllium is the lightest metal and still it is stronger than steel.
  • It also finds various applications in Nuclear reactors as a reflector.
  
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals  
Bombarding Plutonium with Helium Ions  
History
  
  
Who Discovered
Louis Nicolas Vauquelin  
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Discovery
In 1797  
In 1944  
Abundance
  
  
Abundance In Universe
1 * 10-7 %  
23
Not Available  
Abundance In Sun
~0.00000001 %  
29
~-9999 %  
Abundance In Meteorites
0.00 %  
99+
Not Available  
Abundance In Earth's Crust
0.00 %  
35
Not Available  
Abundance In Oceans
0.00 %  
39
Not Available  
Abundance In Humans
0.00 %  
19
Not Available  
Uses
Uses & Benefits
  • Its alloys with copper or nickel are used in manufacturing Gyroscopes, springs, electrical contact and non sparking tools.
  • Beryllium Alloys are used as a material for aircraft, missiles, spacecraft and satellite.
  
  • Curium metal is used to provide power to electrical equipment for space missions.
  
Industrial Uses
Aerospace Industry, Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
Unknown  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
32
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
32
0.00 p.p.m.  
36
Physical Properties
Melting Point
1,278.00 °C  
36
1,340.00 °C  
34
Boiling Point
2,970.00 °C  
32
3,110.00 °C  
30
Appearance
  
  
Physical State
Solid  
Solid  
Color
White Gray  
Silver  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
5.50  
7
Not Available  
Brinell Hardness
590.00 MPa  
21
Not Available  
Vickers Hardness
1,670.00 MPa  
4
Not Available  
Speed of Sound
12,890.00 m/s  
2
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
Be  
Cm  
Isotopes
  
  
Known Isotopes
9  
29
15  
24
Electronegativity
  
  
Pauling Electronegativity
1.57  
24
1.30  
32
Sanderson Electronegativity
1.81  
12
Not Available  
Allred Rochow Electronegativity
1.47  
14
1.20  
27
Mulliken-Jaffe Electronegativity
1.54  
12
Not Available  
Allen Electronegativity
1.58  
23
Not Available  
Electropositivity
  
  
Pauling Electropositivity
2.43  
30
2.70  
22
Ionization Energies
  
  
1st Energy Level
899.50 kJ/mol  
7
581.00 kJ/mol  
99+
2nd Energy Level
1,757.10 kJ/mol  
23
1,196.00 kJ/mol  
99+
3rd Energy Level
14,848.70 kJ/mol  
2
2,026.00 kJ/mol  
99+
4th Energy Level
21,006.60 kJ/mol  
2
3,550.00 kJ/mol  
99+
Electrochemical Equivalent
0.17 g/amp-hr  
99+
3.07 g/amp-hr  
16
Electron Work Function
4.98 eV  
6
Not Available  
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes  
Atomic Properties
Atomic Number
4  
99+
96  
22
Electron Configuration
[He] 2s2  
[Rn] 5f7 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Beryllium.jpg#100  
DHCP-Crystal-Structure-of-Curium.jpg#100  
Atom
  
  
Number of Protons
4  
99+
96  
22
Number of Neutrons
5  
99+
151  
10
Number of Electrons
4  
99+
96  
22
Radius of an Atom
  
  
Atomic Radius
112.00 pm  
99+
174.00 pm  
20
Covalent Radius
96.00 pm  
99+
169.00 pm  
26
Van der Waals Radius
153.00 pm  
99+
200.00 pm  
28
Atomic Weight
9.01 amu  
99+
247.00 amu  
18
Atomic Volume
5.00 cm3/mol  
99+
18.28 cm3/mol  
26
Adjacent Atomic Numbers
  
  
Previous Element
Lithium
  
Americium
  
Next Element
Sodium
  
Berkelium
  
Valence Electron Potential
82.00 (-eV)  
15
44.50 (-eV)  
38
Lattice Constant
228.58 pm  
99+
Not Available  
Lattice Angles
π/2, π/2, π/2  
NA  
Lattice C/A Ratio
1.57  
18
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
1.85 g/cm3  
99+
13.51 g/cm3  
25
Density When Liquid (at m.p.)
1.69 g/cm3  
99+
13.85 g/cm3  
10
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
19
Not Available  
Elasticity properties
  
  
Shear Modulus
132.00 GPa  
7
Not Available  
Bulk Modulus
130.00 GPa  
13
Not Available  
Young's Modulus
287.00 GPa  
7
Not Available  
Poisson Ratio
0.03  
35
Not Available  
Other Mechanical Properties
NA  
Unknown  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
1.85  
99+
13.51  
17
Magnetic Ordering
Diamagnetic  
Antiferromagnetic  
Electrical Properties
  
  
Electrical Property
Semiconductor  
Unknown  
Resistivity
36.00 nΩ·m  
99+
1.25 nΩ·m  
99+
Electrical Conductivity
0.31 106/cm Ω  
5
Not Available  
Electron Affinity
0.00 kJ/mol  
40
Not Available  
Thermal Properties
Specific Heat
1.82 J/(kg K)  
2
Not Available  
Molar Heat Capacity
16.44 J/mol·K  
99+
Not Available  
Thermal Conductivity
200.00 W/m·K  
6
Not Available  
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
11.30 µm/(m·K)  
34
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
294.70 kJ/mol  
30
Not Available  
Enthalpy of Fusion
11.72 kJ/mol  
30
15.00 kJ/mol  
21
Enthalpy of Atomization
326.40 kJ/mol  
30
Not Available  
Standard Molar Entropy
9.50 J/mol.K  
99+
Not Available  
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