×

Mendelevium
Mendelevium

Americium
Americium



ADD
Compare
X
Mendelevium
X
Americium

Mendelevium vs Americium

1 Periodic Table
1.1 Symbol
Md
Am
1.2 Group Number
NANA
Gadolinium
0 17
1.3 Period Number
77
Lithium
2 7
1.4 Block
f block
f block
1.5 Element Family
Actinide
Actinide
1.6 CAS Number
74401117440359
Aluminium
7429905 54386242
1.7 Space Group Name
Not Available
P63/mmc
1.8 Space Group Number
NA194.00
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
2.2 Sources
Bombarding Einsteinium with Helium Ions
Obtained By Bombarding Plutonium with Neutrons
2.3 History
2.3.1 Who Discovered
Lawrence Berkeley National Laboratory
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, 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
2.4.2 Abundance In Sun
~-9999 %~-9999 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
NANA
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NANA
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
NANA
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
3.1.1 Industrial Uses
NA
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
NA
Alloys, Nuclear Research, Research Purposes
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-30.00 Blood/mg dm-3
Plutonium
0 1970
3.2.4 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
827.00 °C994.00 °C
Francium
27 3410
4.2 Boiling Point
NA2,607.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Unknown
Silvery White
4.3.3 Luster
Metallic
NA
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium
0.2 8.5
4.4.2 Brinell Hardness
NANA
Cesium
0.14 3490
4.4.3 Vickers Hardness
NANA
Palladium
121 3430
4.5 Speed of Sound
NANA
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
Md
Am
5.2 Isotopes
5.2.1 Known Isotopes
1616
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.301.30
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.201.20
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
NANA
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.702.70
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
635.00 kJ/mol578.00 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,235.00 kJ/mol1,158.00 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
2,470.00 kJ/mol2,132.00 kJ/mol
Osmium
1600 34230
5.5.4 4th Energy Level
3,840.00 kJ/mol3,493.00 kJ/mol
Thorium
2780 37066
5.5.5 5th Energy Level
NANA
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
3.21 g/amp-hr3.02 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
NANA
Cesium
2.14 5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
6 Atomic
6.1 Atomic Number
10195
Lithium
3 117
6.2 Electron Configuration
[Rn] 5f13 7s2
[Rn] 5f7 7s2
6.3 Crystal Structure
Not Known
Double Hexagonal Close Packed (DHCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
10195
Lithium
3 117
6.4.2 Number of Neutrons
157148
Lithium
4 184
6.4.3 Number of Electrons
10195
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
NA173.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
NA180.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
246.00 pm244.00 pm
Zinc
139 348
6.6 Atomic Weight
258.00 amu243.00 amu
Lithium
6.94 294
6.7 Atomic Volume
NA17.86 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
NA44.00 (-eV)
Francium
8 392.42
6.10 Lattice Constant
NA346.81 pm
Beryllium
228.58 891.25
6.11 Lattice Angles
NA
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
NA12.00 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NANA
Lithium
0.512 20
7.2 Tensile Strength
NANA
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
NA0.00 (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
NANA
Potassium
1.3 222
7.5.2 Bulk Modulus
NANA
Cesium
1.6 462
7.5.3 Young's Modulus
NANA
Cesium
1.7 528
7.6 Poisson Ratio
NANA
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
Unknown
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
NA13.67
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Unknown
Paramagnetic
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
Unknown
8.2.2 Resistivity
NA0.69 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
NA0.02 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
NANA
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
NA0.11 J/(kg K)
Palladium
0.11 3.6
9.2 Molar Heat Capacity
NA62.70 J/mol·K
Beryllium
16.443 62.7
9.3 Thermal Conductivity
NA10.00 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
NANA
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
NANA
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
NA14.39 kJ/mol
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
NA268.00 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
NANA
Beryllium
9.5 198.1