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Curium
Curium

Mendelevium
Mendelevium



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Mendelevium

Curium Mendelevium Comparison

1 Periodic Table
1.1 Symbol
Cm
Md
1.2 Group Number
NANA
Gadolinium Metal
0 17
1.3 Period Number
77
Lithium Metal
2 7
1.4 Block
f block
f block
1.5 Element Family
Actinide
Actinide
1.6 CAS Number
74405197440111
Aluminium Metal
7429905 54386242
1.7 Space Group Name
Not Available
Not Available
1.8 Space Group Number
NANA
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
2.2 Sources
Bombarding Plutonium with Helium Ions
Bombarding Einsteinium with Helium Ions
2.3 History
2.3.1 Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Lawrence Berkeley National Laboratory
2.3.2 Discovery
In 1944
In 1955
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium Metal
5E-09 0.11
2.4.3 Abundance In Sun
~-9999 %~-9999 %
Beryllium Metal
1E-08 0.1
2.4.5 Abundance In Meteorites
NANA
Gold Metal
1.7E-07 22
2.4.8 Abundance In Earth's Crust
NANA
Radium Metal
9.9E-12 8.1
2.4.10 Abundance In Oceans
NANA
Protactinium Metal
2E-23 1.1
2.4.12 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  • Currently known uses of Mendelevium metal are limited to research purpose only.
3.1.1 Industrial Uses
NA
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Research Purposes
NA
3.2 Biological Properties
3.2.1 Toxicity
Unknown
Unknown
3.2.2 Present in Human Body
3.2.4 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium Metal
0 1970
3.2.6 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
1,340.00 °C827.00 °C
Francium Metal
27 3410
4.2 Boiling Point
3,110.00 °CNA
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silver
Unknown
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
4.4.4 Brinell Hardness
NANA
Cesium Metal
0.14 3490
4.5.1 Vickers Hardness
NANA
Palladium Metal
121 3430
4.6 Speed of Sound
NANA
Thallium Metal
818 16200
5.2 Optical Properties
5.2.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
5.2.2 Reflectivity
NANA
Molybdenum Metal
58 97
5.6 Allotropes
5.6.1 α Allotropes
Not Available
Not Available
5.6.2 β Allotropes
Not Available
Not Available
5.6.3 γ Allotropes
Not Available
Not Available
6 Chemical
6.1 Chemical Formula
Cm
Md
6.2 Isotopes
6.2.1 Known Isotopes
1516
Tennessine Metal
0 38
6.3 Electronegativity
6.3.1 Pauling Electronegativity
1.301.30
Francium Metal
0.7 2.54
6.3.2 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
6.3.4 Allred Rochow Electronegativity
1.201.20
Cesium Metal
0.86 1.82
6.4.2 Mulliken-Jaffe Electronegativity
NANA
Cesium Metal
0.62 2.48
6.4.4 Allen Electronegativity
NANA
Cesium Metal
0.659 2.7
6.6 Electropositivity
6.6.1 Pauling Electropositivity
2.702.70
Gold Metal
1.46 3.3
6.7 Ionization Energies
6.7.1 1st Energy Level
581.00 kJ/mol635.00 kJ/mol
Cesium Metal
375.7 26130
6.8.1 2nd Energy Level
1,196.00 kJ/mol1,235.00 kJ/mol
Ruthenium Metal
710.2162 28750
6.10.1 3rd Energy Level
2,026.00 kJ/mol2,470.00 kJ/mol
Osmium Metal
1600 34230
6.11.1 4th Energy Level
3,550.00 kJ/mol3,840.00 kJ/mol
Thorium Metal
2780 37066
6.12.1 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
7.1.2 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
7.1.3 7th Energy level
NANA
Bohrium Metal
7226.8 114300
7.1.5 8th Energy Level
NANA
Hassium Metal
8857.4 125300
7.2.1 9th Energy Level
NANA
Yttrium Metal
14110 134700
7.3.1 10th Energy Level
NANA
Strontium Metal
17100 144300
7.4.2 11th Energy Level
NANA
Yttrium Metal
19900 169988
7.4.4 12th Energy Level
NANA
Molybdenum Metal
22219 189368
7.5.2 13th Energy Level
NANA
Molybdenum Metal
26930 76015
7.5.4 14th Energy Level
NANA
Molybdenum Metal
29196 86450
7.5.5 15th Energy Level
NANA
Manganese Metal
41987 97510
7.5.7 16th Energy Level
NANA
Iron Metal
47206 109480
7.6.1 17th Energy Level
NANA
Cobalt Metal
52737 122200
8.1.2 18th Energy Level
NANA
Nickel Metal
58570 134810
8.1.5 19th Energy Level
NANA
Copper Metal
64702 148700
8.1.7 20th Energy Level
NANA
Molybdenum Metal
80400 171200
8.1.8 21st Energy Level
NANA
Molybdenum Metal
87000 179100
8.2.3 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
8.2.4 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
8.2.6 24th Energy Level
NANA
Molybdenum Metal
104400 195200
8.2.7 25th Energy Level
NANA
Molybdenum Metal
121900 121900
8.2.9 26th Energy Level
NANA
Molybdenum Metal
127700 127700
8.2.10 27th Energy Level
NANA
Molybdenum Metal
133800 133800
9.1.1 28th Energy Level
NANA
Molybdenum Metal
139800 139800
9.2.1 29th Energy Level
NANA
Molybdenum Metal
148100 148100
9.2.2 30th Energy Level
NANA
Molybdenum Metal
154500 154500
9.4 Electrochemical Equivalent
3.07 g/amp-hr3.21 g/amp-hr
Beryllium Metal
0.16812 8.3209
9.6 Electron Work Function
NANA
Cesium Metal
2.14 5.65
9.8 Other Chemical Properties
Ionization, Radioactive Isotopes
Ionization, Radioactive Isotopes, Radioactivity
10 Atomic
10.1 Atomic Number
96101
Lithium Metal
3 117
10.3 Electron Configuration
[Rn] 5f7 6d1 7s2
[Rn] 5f13 7s2
10.4 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Not Known
10.4.1 Crystal Lattice
10.5 Atom
10.5.1 Number of Protons
96101
Lithium Metal
3 117
10.5.3 Number of Neutrons
151157
Lithium Metal
4 184
10.5.5 Number of Electrons
96101
Lithium Metal
3 117
10.7 Radius of an Atom
10.7.1 Atomic Radius
174.00 pmNA
Beryllium Metal
112 265
10.7.2 Covalent Radius
169.00 pmNA
Beryllium Metal
96 260
10.7.3 Van der Waals Radius
200.00 pm246.00 pm
Zinc Metal
139 348
10.8 Atomic Weight
247.00 amu258.00 amu
Lithium Metal
6.94 294
10.9 Atomic Volume
18.28 cm3/molNA
Manganese Metal
1.39 71.07
10.10 Adjacent Atomic Numbers
10.10.1 Previous Element
10.10.2 Next Element
10.11 Valence Electron Potential
44.50 (-eV)NA
Francium Metal
8 392.42
10.12 Lattice Constant
NANA
Beryllium Metal
228.58 891.25
10.13 Lattice Angles
NA
NA
10.14 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
11 Mechanical
11.1 Density
11.1.1 Density At Room Temperature
13.51 g/cm3NA
Lithium Metal
0.534 40.7
11.1.2 Density When Liquid (at m.p.)
13.85 g/cm3NA
Lithium Metal
0.512 20
11.2 Tensile Strength
NANA
Indium Metal
2.5 11000
11.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
11.4 Vapor Pressure
11.4.1 Vapor Pressure at 1000 K
NANA
Cerium Metal
2.47E-11 121
11.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
11.5 Elasticity properties
11.5.1 Shear Modulus
NANA
Potassium Metal
1.3 222
11.5.2 Bulk Modulus
NANA
Cesium Metal
1.6 462
11.5.3 Young's Modulus
NANA
Cesium Metal
1.7 528
11.6 Poisson Ratio
NANA
Beryllium Metal
0.032 0.47
11.7 Other Mechanical Properties
Unknown
Unknown
12 Magnetic
12.1 Magnetic Characteristics
12.1.1 Specific Gravity
13.51NA
Lithium Metal
0.53 4500
12.1.2 Magnetic Ordering
Antiferromagnetic
Unknown
12.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
12.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
12.2 Electrical Properties
12.2.1 Electrical Property
Unknown
Unknown
12.2.2 Resistivity
1.25 nΩ·mNA
Thallium Metal
0.18 961
12.2.3 Electrical Conductivity
NANA
Plutonium Metal
0.00666 0.63
12.2.4 Electron Affinity
NANA
Mercury Metal
0 222.8
13 Thermal
13.1 Specific Heat
NANA
Americium Metal
0.11 3.6
13.2 Molar Heat Capacity
NANA
Beryllium Metal
16.443 62.7
13.3 Thermal Conductivity
NANA
Neptunium Metal
6.3 429
13.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
13.5 Thermal Expansion
NANA
Tungsten Metal
4.5 97
13.6 Enthalpy
13.6.1 Enthalpy of Vaporization
NANA
Zinc Metal
7.32 799.1
13.6.2 Enthalpy of Fusion
15.00 kJ/molNA
Cesium Metal
2.1 35.23
13.6.3 Enthalpy of Atomization
NANA
Mercury Metal
61.5 837
13.7 Standard Molar Entropy
NANA
Beryllium Metal
9.5 198.1