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Mendelevium
Mendelevium

Curium
Curium



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Mendelevium
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Mendelevium vs Curium

1 Periodic Table
1.1 Symbol
Md
Cm
1.2 Group Number
NANA
Gadolinium
0 17
1.3 Period Number
77
Lithium
2 7
1.3 Block
f block
f block
1.4 Element Family
Actinide
Actinide
1.5 CAS Number
74401117440519
Aluminium
7429905 54386242
1.8 Space Group Name
Not Available
Not Available
1.9 Space Group Number
NANA
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
2.2 Sources
Bombarding Einsteinium with Helium Ions
Bombarding Plutonium with Helium Ions
2.3 History
2.3.1 Who Discovered
Lawrence Berkeley National Laboratory
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
2.3.2 Discovery
In 1955
In 1944
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium
5E-09 0.11
2.8.1 Abundance In Sun
~-9999 %~-9999 %
Beryllium
1E-08 0.1
4.2.1 Abundance In Meteorites
NANA
Gold
1.7E-07 22
4.4.3 Abundance In Earth's Crust
NANA
Radium
9.9E-12 8.1
4.4.6 Abundance In Oceans
NANA
Protactinium
2E-23 1.1
4.4.9 Abundance In Humans
NANA
Radium
1E-13 1.4
5 Uses
5.1 Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  • Curium metal is used to provide power to electrical equipment for space missions.
5.1.1 Industrial Uses
NA
NA
5.1.2 Medical Uses
NA
NA
5.1.3 Other Uses
NA
Research Purposes
5.2 Biological Properties
5.2.1 Toxicity
Unknown
Unknown
5.2.2 Present in Human Body
5.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium
0 1970
5.2.6 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium
0 170000
7 Physical
7.1 Melting Point
827.00 °C1,340.00 °C
Francium
27 3410
8.3 Boiling Point
NA3,110.00 °C
Flerovium
147 5660
9.2 Appearance
9.2.1 Physical State
Solid
Solid
9.2.2 Color
Unknown
Silver
9.2.3 Luster
Metallic
Metallic
9.3 Hardness
9.3.1 Mohs Hardness
NANA
Cesium
0.2 8.5
10.2.1 Brinell Hardness
NANA
Cesium
0.14 3490
10.5.2 Vickers Hardness
NANA
Palladium
121 3430
10.8 Speed of Sound
NANA
Thallium
818 16200
10.9 Optical Properties
10.9.1 Refractive Index
NANA
Mercury
1.000933 1.7229
10.9.3 Reflectivity
NANA
Molybdenum
58 97
10.11 Allotropes
10.11.1 α Allotropes
Not Available
Not Available
10.11.2 β Allotropes
Not Available
Not Available
10.11.3 γ Allotropes
Not Available
Not Available
11 Chemical
11.1 Chemical Formula
Md
Cm
11.2 Isotopes
11.2.1 Known Isotopes
1615
Tennessine
0 38
11.5 Electronegativity
11.5.1 Pauling Electronegativity
1.301.30
Francium
0.7 2.54
12.2.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
12.3.1 Allred Rochow Electronegativity
1.201.20
Cesium
0.86 1.82
13.2.2 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
13.3.2 Allen Electronegativity
NANA
Cesium
0.659 2.7
13.4 Electropositivity
13.4.1 Pauling Electropositivity
2.702.70
Gold
1.46 3.3
13.5 Ionization Energies
13.5.1 1st Energy Level
635.00 kJ/mol581.00 kJ/mol
Cesium
375.7 26130
13.5.4 2nd Energy Level
1,235.00 kJ/mol1,196.00 kJ/mol
Ruthenium
710.2162 28750
13.6.2 3rd Energy Level
2,470.00 kJ/mol2,026.00 kJ/mol
Osmium
1600 34230
13.7.2 4th Energy Level
3,840.00 kJ/mol3,550.00 kJ/mol
Thorium
2780 37066
13.8.3 5th Energy Level
NANA
Dubnium
4305.2 97510
13.9.3 6th Energy Level
NANA
Seaborgium
5715.8 105800
13.9.6 7th Energy level
NANA
Bohrium
7226.8 114300
13.9.8 8th Energy Level
NANA
Hassium
8857.4 125300
13.9.11 9th Energy Level
NANA
Yttrium
14110 134700
13.9.15 10th Energy Level
NANA
Strontium
17100 144300
13.9.18 11th Energy Level
NANA
Yttrium
19900 169988
13.9.21 12th Energy Level
NANA
Molybdenum
22219 189368
13.9.24 13th Energy Level
NANA
Molybdenum
26930 76015
13.9.27 14th Energy Level
NANA
Molybdenum
29196 86450
13.9.30 15th Energy Level
NANA
Manganese
41987 97510
13.9.33 16th Energy Level
NANA
Iron
47206 109480
13.9.36 17th Energy Level
NANA
Cobalt
52737 122200
13.9.38 18th Energy Level
NANA
Nickel
58570 134810
13.9.41 19th Energy Level
NANA
Copper
64702 148700
13.9.43 20th Energy Level
NANA
Molybdenum
80400 171200
13.9.46 21st Energy Level
NANA
Molybdenum
87000 179100
13.9.48 22nd Energy Level
NANA
Molybdenum
93400 184900
13.9.50 23rd Energy Level
NANA
Molybdenum
98420 198800
13.9.53 24th Energy Level
NANA
Molybdenum
104400 195200
13.9.56 25th Energy Level
NANA
Molybdenum
121900 121900
13.9.59 26th Energy Level
NANA
Molybdenum
127700 127700
13.9.61 27th Energy Level
NANA
Molybdenum
133800 133800
13.9.64 28th Energy Level
NANA
Molybdenum
139800 139800
13.9.67 29th Energy Level
NANA
Molybdenum
148100 148100
13.9.70 30th Energy Level
NANA
Molybdenum
154500 154500
13.10 Electrochemical Equivalent
3.21 g/amp-hr3.07 g/amp-hr
Beryllium
0.16812 8.3209
13.11 Electron Work Function
NANA
Cesium
2.14 5.65
13.12 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes
14 Atomic
14.1 Atomic Number
10196
Lithium
3 117
14.3 Electron Configuration
[Rn] 5f13 7s2
[Rn] 5f7 6d1 7s2
14.4 Crystal Structure
Not Known
Double Hexagonal Close Packed (DHCP)
14.4.1 Crystal Lattice
14.5 Atom
14.5.1 Number of Protons
10196
Lithium
3 117
14.6.2 Number of Neutrons
157151
Lithium
4 184
15.1.2 Number of Electrons
10196
Lithium
3 117
15.6 Radius of an Atom
15.6.1 Atomic Radius
NA174.00 pm
Beryllium
112 265
15.7.2 Covalent Radius
NA169.00 pm
Beryllium
96 260
16.1.1 Van der Waals Radius
246.00 pm200.00 pm
Zinc
139 348
16.2 Atomic Weight
258.00 amu247.00 amu
Lithium
6.94 294
16.7 Atomic Volume
NA18.28 cm3/mol
Manganese
1.39 71.07
16.8 Adjacent Atomic Numbers
16.8.1 Previous Element
16.8.2 Next Element
16.9 Valence Electron Potential
NA44.50 (-eV)
Francium
8 392.42
16.10 Lattice Constant
NANA
Beryllium
228.58 891.25
16.13 Lattice Angles
NA
NA
16.14 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
17 Mechanical
17.1 Density
17.1.1 Density At Room Temperature
NA13.51 g/cm3
Lithium
0.534 40.7
17.3.1 Density When Liquid (at m.p.)
NA13.85 g/cm3
Lithium
0.512 20
17.6 Tensile Strength
NANA
Indium
2.5 11000
17.10 Viscosity
NANA
Mercury
0.001526 0.001526
18.2 Vapor Pressure
18.2.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
18.4.2 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
18.6 Elasticity properties
18.6.1 Shear Modulus
NANA
Potassium
1.3 222
18.9.1 Bulk Modulus
NANA
Cesium
1.6 462
19.2.2 Young's Modulus
NANA
Cesium
1.7 528
19.3 Poisson Ratio
NANA
Beryllium
0.032 0.47
19.6 Other Mechanical Properties
Unknown
Unknown
20 Magnetic
20.1 Magnetic Characteristics
20.1.1 Specific Gravity
NA13.51
Lithium
0.53 4500
20.2.1 Magnetic Ordering
Unknown
Antiferromagnetic
20.2.2 Permeability
NANA
Bismuth
1.25643E-06 0.0063
20.3.3 Susceptibility
NANA
Bismuth
-0.000166 200000
20.4 Electrical Properties
20.4.1 Electrical Property
Unknown
Unknown
20.5.1 Resistivity
NA1.25 nΩ·m
Thallium
0.18 961
21.1.2 Electrical Conductivity
NANA
Plutonium
0.00666 0.63
21.1.6 Electron Affinity
NANA
Mercury
0 222.8
22 Thermal
22.1 Specific Heat
NANA
Americium
0.11 3.6
22.3 Molar Heat Capacity
NANA
Beryllium
16.443 62.7
23.2 Thermal Conductivity
NANA
Neptunium
6.3 429
23.3 Critical Temperature
NANA
Ytterbium
26.3 3223
24.2 Thermal Expansion
NANA
Tungsten
4.5 97
24.5 Enthalpy
24.5.1 Enthalpy of Vaporization
NANA
Zinc
7.32 799.1
24.6.2 Enthalpy of Fusion
NA15.00 kJ/mol
Cesium
2.1 35.23
25.0.0 Enthalpy of Atomization
NANA
Mercury
61.5 837
25.4 Standard Molar Entropy
NANA
Beryllium
9.5 198.1