×

Americium
Americium

Polonium
Polonium



ADD
Compare
X
Americium
X
Polonium

Americium Polonium Comparison

1 Periodic Table
1.1 Symbol
Am
Po
1.2 Group Number
NA16
Gadolinium Metal
0 17
1.3 Period Number
76
Lithium Metal
2 7
1.4 Block
f block
p block
1.5 Element Family
Actinide
Post-​Transition
1.6 CAS Number
74403597440086
Aluminium Metal
7429905 54386242
1.7 Space Group Name
P63/mmc
Pm-3m
1.8 Space Group Number
194.00221.00
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  • Polonium was the first radioactive element to be discovered.
  • Polonium element and its compounds are highly radioactive.
  • Its alloy with Beryllium provides source of neutrons.
2.2 Sources
Obtained By Bombarding Plutonium with Neutrons
Mining, Ores of metals
2.3 History
2.3.1 Who Discovered
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso
Pierre Curie and Marie Curie
2.3.2 Discovery
In 1944
In 1898
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium Metal
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~-9999 %
Beryllium Metal
1E-08 0.1
2.4.3 Abundance In Meteorites
NANA
Gold Metal
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NANA
Radium Metal
9.9E-12 8.1
2.4.5 Abundance In Oceans
NA0.00 %
Protactinium Metal
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  • Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
  • A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
3.1.1 Industrial Uses
NA
Aerospace Industry, Ammunition Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Toxic
Highly 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 Metal
0 1970
3.2.4 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
994.00 °C254.00 °C
Francium Metal
27 3410
4.2 Boiling Point
2,607.00 °C962.00 °C
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Silver
4.3.3 Luster
NA
NA
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
4.4.2 Brinell Hardness
NANA
Cesium Metal
0.14 3490
4.4.3 Vickers Hardness
NANA
Palladium Metal
121 3430
4.5 Speed of Sound
NANA
Thallium Metal
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum Metal
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
α-polonium
4.7.2 β Allotropes
Not Available
β-polonium
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Am
Po
5.2 Isotopes
5.2.1 Known Isotopes
1629
Tennessine Metal
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.302.00
Francium Metal
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.201.76
Cesium Metal
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NA2.48
Cesium Metal
0.62 2.48
5.3.5 Allen Electronegativity
NA2.19
Cesium Metal
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.702.00
Gold Metal
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
578.00 kJ/mol812.10 kJ/mol
Cesium Metal
375.7 26130
5.5.2 2nd Energy Level
1,158.00 kJ/molNA
Ruthenium Metal
710.2162 28750
5.5.3 3rd Energy Level
2,132.00 kJ/molNA
Osmium Metal
1600 34230
5.5.4 4th Energy Level
3,493.00 kJ/molNA
Thorium Metal
2780 37066
5.5.5 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium Metal
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium Metal
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium Metal
14110 134700
5.5.10 10th Energy Level
NANA
Strontium Metal
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium Metal
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum Metal
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum Metal
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum Metal
29196 86450
5.5.15 15th Energy Level
NANA
Manganese Metal
41987 97510
5.5.16 16th Energy Level
NANA
Iron Metal
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt Metal
52737 122200
5.5.18 18th Energy Level
NANA
Nickel Metal
58570 134810
5.5.19 19th Energy Level
NANA
Copper Metal
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum Metal
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum Metal
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum Metal
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum Metal
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum Metal
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum Metal
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum Metal
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum Metal
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum Metal
154500 154500
5.6 Electrochemical Equivalent
3.02 g/amp-hr3.90 g/amp-hr
Beryllium Metal
0.16812 8.3209
5.7 Electron Work Function
NANA
Cesium Metal
2.14 5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
9584
Lithium Metal
3 117
6.2 Electron Configuration
[Rn] 5f7 7s2
[Xe] 4f14 5d10 6s2 6p4
6.3 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Monoclinic (MON)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
9584
Lithium Metal
3 117
6.4.2 Number of Neutrons
148125
Lithium Metal
4 184
6.4.3 Number of Electrons
9584
Lithium Metal
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
173.00 pm168.00 pm
Beryllium Metal
112 265
6.5.2 Covalent Radius
180.00 pm140.00 pm
Beryllium Metal
96 260
6.5.3 Van der Waals Radius
244.00 pm197.00 pm
Zinc Metal
139 348
6.6 Atomic Weight
243.00 amu209.00 amu
Lithium Metal
6.94 294
6.7 Atomic Volume
17.86 cm3/mol22.23 cm3/mol
Manganese Metal
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
44.00 (-eV)NA
Francium Metal
8 392.42
6.10 Lattice Constant
346.81 pm335.90 pm
Beryllium Metal
228.58 891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
12.00 g/cm39.20 g/cm3
Lithium Metal
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NA9.40 g/cm3
Lithium Metal
0.512 20
7.2 Tensile Strength
NANA
Indium Metal
2.5 11000
7.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
0.00 (Pa)NA
Cerium Metal
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NANA
Potassium Metal
1.3 222
7.5.2 Bulk Modulus
NANA
Cesium Metal
1.6 462
7.5.3 Young's Modulus
NANA
Cesium Metal
1.7 528
7.6 Poisson Ratio
NANA
Beryllium Metal
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
13.679.32
Lithium Metal
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Nonmagnetic
8.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Unknown
Conductor
8.2.2 Resistivity
0.69 nΩ·m0.40 nΩ·m
Thallium Metal
0.18 961
8.2.3 Electrical Conductivity
0.02 106/cm Ω0.02 106/cm Ω
Plutonium Metal
0.00666 0.63
8.2.4 Electron Affinity
NA183.30 kJ/mol
Mercury Metal
0 222.8
9 Thermal
9.1 Specific Heat
0.11 J/(kg K)0.12 J/(kg K)
Palladium
0.11 3.6
9.2 Molar Heat Capacity
62.70 J/mol·K26.40 J/mol·K
Beryllium Metal
16.443 62.7
9.3 Thermal Conductivity
10.00 W/m·K20.00 W/m·K
Neptunium Metal
6.3 429
9.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
9.5 Thermal Expansion
NA23.50 µm/(m·K)
Tungsten Metal
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
NA60.30 kJ/mol
Zinc Metal
7.32 799.1
9.6.2 Enthalpy of Fusion
14.39 kJ/mol13.00 kJ/mol
Cesium Metal
2.1 35.23
9.6.3 Enthalpy of Atomization
268.00 kJ/mol134.00 kJ/mol
Mercury Metal
61.5 837
9.7 Standard Molar Entropy
NANA
Beryllium Metal
9.5 198.1