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Curium
Curium

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1 Periodic Table
1.1 Symbol
Cm
Pb
1.2 Group Number
NA14
Gadolinium
0 17
1.3 Period Number
76
Lithium
2 7
1.4 Block
f block
p block
1.5 Element Family
Actinide
Post-​Transition
1.6 CAS Number
74405197439921
Aluminium
7429905 54386242
1.7 Space Group Name
Not Available
Fm_ 3m
1.8 Space Group Number
NA225.00
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  • Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
  • The best available source of Lead metal today is by recycling automobile batteries.
2.2 Sources
Bombarding Plutonium with Helium Ions
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Unknown
2.3.2 Discovery
In 1944
In Middle Easterns (7000 BCE)
2.4 Abundance
2.4.1 Abundance In Universe
NA1 * 10-6 %
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~0.000001 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
NA0.00 %
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NA0.00 %
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
NA0.00 %
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
NA0.00 %
Radium
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  • It is also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
3.1.1 Industrial Uses
NA
Chemical Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
NA
Surgical Instruments Manufacturing
3.1.3 Other Uses
Research Purposes
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Unknown
Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-30.21 Blood/mg dm-3
Plutonium
0 1970
3.2.4 In Bone
0.00 p.p.m.30.00 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
1,340.00 °C327.50 °C
Francium
27 3410
4.2 Boiling Point
3,110.00 °C1,740.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silver
Gray
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NA1.50
Cesium
0.2 8.5
4.4.2 Brinell Hardness
NA38.00 MPa
Cesium
0.14 3490
4.4.3 Vickers Hardness
NANA
Palladium
121 3430
4.5 Speed of Sound
NA1,190.00 m/s
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Cm
Pb
5.2 Isotopes
5.2.1 Known Isotopes
1535
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.301.87
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
NA2.29
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.201.55
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NA2.41
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
NA1.85
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.701.67
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
581.00 kJ/mol715.60 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,196.00 kJ/mol1,450.50 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
2,026.00 kJ/mol3,081.50 kJ/mol
Osmium
1600 34230
5.5.4 4th Energy Level
3,550.00 kJ/mol4,083.00 kJ/mol
Thorium
2780 37066
5.5.5 5th Energy Level
NA6,640.00 kJ/mol
Dubnium
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium
14110 134700
5.5.10 10th Energy Level
NANA
Strontium
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum
29196 86450
5.5.15 15th Energy Level
NANA
Manganese
41987 97510
5.5.16 16th Energy Level
NANA
Iron
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt
52737 122200
5.5.18 18th Energy Level
NANA
Nickel
58570 134810
5.5.19 19th Energy Level
NANA
Copper
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum
154500 154500
5.6 Electrochemical Equivalent
3.07 g/amp-hr3.87 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
NA4.25 eV
Cesium
2.14 5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes
Anti Corrosion, Ionization, Radioactive Isotopes
6 Atomic
6.1 Atomic Number
9682
Lithium
3 117
6.2 Electron Configuration
[Rn] 5f7 6d1 7s2
[Xe] 4f14 5d10 6s2 6p2
6.3 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
9682
Lithium
3 117
6.4.2 Number of Neutrons
151125
Lithium
4 184
6.4.3 Number of Electrons
9682
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
174.00 pm175.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
169.00 pm146.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
200.00 pm202.00 pm
Zinc
139 348
6.6 Atomic Weight
247.00 amu207.20 amu
Lithium
6.94 294
6.7 Atomic Volume
18.28 cm3/mol18.17 cm3/mol
Manganese
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
44.50 (-eV)24.20 (-eV)
Francium
8 392.42
6.10 Lattice Constant
NA495.08 pm
Beryllium
228.58 891.25
6.11 Lattice Angles
NA
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
13.51 g/cm311.34 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
13.85 g/cm310.66 g/cm3
Lithium
0.512 20
7.2 Tensile Strength
NA12.00 MPa
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NA1.64 (Pa)
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NA5.60 GPa
Potassium
1.3 222
7.5.2 Bulk Modulus
NA46.00 GPa
Cesium
1.6 462
7.5.3 Young's Modulus
NA16.00 GPa
Cesium
1.7 528
7.6 Poisson Ratio
NA0.44
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
Unknown
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
13.5111.35
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Antiferromagnetic
Diamagnetic
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Unknown
Poor Conductor
8.2.2 Resistivity
1.25 nΩ·m208.00 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
NA0.05 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
NA35.10 kJ/mol
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
NA0.13 J/(kg K)
Americium
0.11 3.6
9.2 Molar Heat Capacity
NA26.65 J/mol·K
Beryllium
16.443 62.7
9.3 Thermal Conductivity
NA35.30 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
NA28.90 µm/(m·K)
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
NA179.40 kJ/mol
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
15.00 kJ/mol4.77 kJ/mol
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
NA194.60 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
NA64.80 J/mol.K
Beryllium
9.5 198.1