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Polonium
Polonium

Bohrium
Bohrium



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Polonium
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Bohrium

Polonium Bohrium Comparison

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1 Periodic Table
1.1 Symbol
Po
Bh
1.2 Group Number
167
Gadolinium Metal
0 17
1.4 Period Number
67
Lithium Metal
2 7
1.5 Block
p block
d block
1.6 Element Family
Post-​Transition
Transition Metal
1.7 CAS Number
744008654037148
Aluminium Metal
7429905 54386242
2.2 Space Group Name
Pm-3m
Not Available
2.3 Space Group Number
221.00NA
Plutonium Metal
11 229
3 Facts
3.1 Interesting Facts
  • 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.
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
3.2 Sources
Mining, Ores of metals
Found in Minerals, Mining, Synthetically Produced
3.3 History
3.3.1 Who Discovered
Pierre Curie and Marie Curie
Gesellschaft für Schwerionenforschung
3.3.3 Discovery
In 1898
In 1981
3.4 Abundance
3.4.1 Abundance In Universe
NANA
Thallium Metal
5E-09 0.11
3.5.1 Abundance In Sun
~-9999 %~-9999 %
Beryllium Metal
1E-08 0.1
3.6.1 Abundance In Meteorites
NANA
Gold Metal
1.7E-07 22
3.7.1 Abundance In Earth's Crust
NANA
Radium Metal
9.9E-12 8.1
3.8.3 Abundance In Oceans
0.00 %NA
Protactinium Metal
2E-23 1.1
3.8.6 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
4 Uses
4.1 Uses & Benefits
  • 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.
  • Currently known uses of Bohrium metal are limited to research purpose only.
4.1.1 Industrial Uses
Aerospace Industry, Ammunition Industry
NA
4.1.2 Medical Uses
NA
NA
4.1.4 Other Uses
Alloys
Research Purposes
4.2 Biological Properties
4.2.1 Toxicity
Highly Toxic
Unknown
4.2.2 Present in Human Body
4.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium Metal
0 1970
4.3.2 In Bone
0.00 p.p.m.0.00 p.p.m.
Plutonium Metal
0 170000
5 Physical
5.1 Melting Point
254.00 °CNA
Francium Metal
27 3410
5.2 Boiling Point
962.00 °CNA
Flerovium Metal
147 5660
5.3 Appearance
5.3.1 Physical State
Solid
Solid
5.3.2 Color
Silver
Unknown
5.3.3 Luster
NA
Unknown Luster
5.4 Hardness
5.4.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
1.3.2 Brinell Hardness
NANA
Cesium Metal
0.14 3490
1.8.1 Vickers Hardness
NANA
Palladium Metal
121 3430
2.5 Speed of Sound
NANA
Thallium Metal
818 16200
2.6 Optical Properties
2.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
2.7.2 Reflectivity
NANA
Molybdenum Metal
58 97
2.8 Allotropes
2.9.1 α Allotropes
α-polonium
Not Available
3.1.1 β Allotropes
β-polonium
Not Available
3.1.3 γ Allotropes
Not Available
Not Available
4 Chemical
4.2 Chemical Formula
Po
Bh
4.3 Isotopes
4.3.1 Known Isotopes
295
Tennessine Metal
0 38
6.2 Electronegativity
6.2.1 Pauling Electronegativity
2.00NA
Francium Metal
0.7 2.54
6.3.1 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
6.8.3 Allred Rochow Electronegativity
1.76NA
Cesium Metal
0.86 1.82
6.8.6 Mulliken-Jaffe Electronegativity
2.48NA
Cesium Metal
0.62 2.48
6.10.2 Allen Electronegativity
2.19NA
Cesium Metal
0.659 2.7
7.3 Electropositivity
7.3.1 Pauling Electropositivity
2.00NA
Gold Metal
1.46 3.3
7.6 Ionization Energies
7.6.1 1st Energy Level
812.10 kJ/mol742.90 kJ/mol
Cesium Metal
375.7 26130
7.6.4 2nd Energy Level
NA1,688.50 kJ/mol
Ruthenium Metal
710.2162 28750
7.8.1 3rd Energy Level
NA2,566.50 kJ/mol
Osmium Metal
1600 34230
7.9.3 4th Energy Level
NA3,598.90 kJ/mol
Thorium Metal
2780 37066
7.10.2 5th Energy Level
NA4,727.80 kJ/mol
Dubnium Metal
4305.2 97510
7.12.1 6th Energy Level
NA5,991.70 kJ/mol
Seaborgium Metal
5715.8 105800
7.12.4 7th Energy level
NA7,226.80 kJ/mol
Sodium
7226.8 114300
7.13.3 8th Energy Level
NANA
Hassium Metal
8857.4 125300
7.15.1 9th Energy Level
NANA
Yttrium Metal
14110 134700
8.1.3 10th Energy Level
NANA
Strontium Metal
17100 144300
8.1.7 11th Energy Level
NANA
Yttrium Metal
19900 169988
8.1.12 12th Energy Level
NANA
Molybdenum Metal
22219 189368
8.3.1 13th Energy Level
NANA
Molybdenum Metal
26930 76015
8.4.3 14th Energy Level
NANA
Molybdenum Metal
29196 86450
8.4.8 15th Energy Level
NANA
Manganese Metal
41987 97510
8.6.1 16th Energy Level
NANA
Iron Metal
47206 109480
8.7.2 17th Energy Level
NANA
Cobalt Metal
52737 122200
9.4.2 18th Energy Level
NANA
Nickel Metal
58570 134810
9.4.5 19th Energy Level
NANA
Copper Metal
64702 148700
9.5.1 20th Energy Level
NANA
Molybdenum Metal
80400 171200
9.6.3 21st Energy Level
NANA
Molybdenum Metal
87000 179100
10.1.2 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
10.2.1 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
10.3.1 24th Energy Level
NANA
Molybdenum Metal
104400 195200
10.5.2 25th Energy Level
NANA
Molybdenum Metal
121900 121900
10.7.3 26th Energy Level
NANA
Molybdenum Metal
127700 127700
11.1.2 27th Energy Level
NANA
Molybdenum Metal
133800 133800
11.1.4 28th Energy Level
NANA
Molybdenum Metal
139800 139800
11.2.1 29th Energy Level
NANA
Molybdenum Metal
148100 148100
11.4.2 30th Energy Level
NANA
Molybdenum Metal
154500 154500
11.5 Electrochemical Equivalent
3.90 g/amp-hrNA
Beryllium Metal
0.16812 8.3209
12.2 Electron Work Function
NANA
Cesium Metal
2.14 5.65
12.4 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes
13 Atomic
13.1 Atomic Number
84107
Lithium Metal
3 117
14.3 Electron Configuration
[Xe] 4f14 5d10 6s2 6p4
[Rn] 5f14 6d5 7s2
14.4 Crystal Structure
Monoclinic (MON)
Hexagonal Close Packed (HCP)
14.4.1 Crystal Lattice
14.5 Atom
14.5.1 Number of Protons
84107
Lithium Metal
3 117
14.7.1 Number of Neutrons
125155
Lithium Metal
4 184
14.8.1 Number of Electrons
84107
Lithium Metal
3 117
15.4 Radius of an Atom
15.4.1 Atomic Radius
168.00 pm128.00 pm
Beryllium Metal
112 265
15.5.1 Covalent Radius
140.00 pm141.00 pm
Beryllium Metal
96 260
15.7.1 Van der Waals Radius
197.00 pmNA
Zinc Metal
139 348
15.9 Atomic Weight
209.00 amu270.00 amu
Lithium Metal
6.94 294
15.10 Atomic Volume
22.23 cm3/molNA
Manganese Metal
1.39 71.07
15.13 Adjacent Atomic Numbers
15.13.1 Previous Element
15.13.2 Next Element
15.14 Valence Electron Potential
NANA
Francium Metal
8 392.42
15.15 Lattice Constant
335.90 pmNA
Beryllium Metal
228.58 891.25
15.16 Lattice Angles
π/2, π/2, π/2
NA
15.17 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
16 Mechanical
16.1 Density
16.1.1 Density At Room Temperature
9.20 g/cm337.10 g/cm3
Lithium Metal
0.534 40.7
16.1.2 Density When Liquid (at m.p.)
9.40 g/cm3NA
Lithium Metal
0.512 20
16.2 Tensile Strength
NANA
Indium Metal
2.5 11000
16.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
16.4 Vapor Pressure
16.4.1 Vapor Pressure at 1000 K
NANA
Cerium Metal
2.47E-11 121
16.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
16.5 Elasticity properties
16.5.1 Shear Modulus
NANA
Potassium Metal
1.3 222
16.5.2 Bulk Modulus
NANA
Cesium Metal
1.6 462
16.5.3 Young's Modulus
NANA
Cesium Metal
1.7 528
16.6 Poisson Ratio
NANA
Beryllium Metal
0.032 0.47
16.7 Other Mechanical Properties
NA
Unknown
17 Magnetic
17.1 Magnetic Characteristics
17.1.1 Specific Gravity
9.32NA
Lithium Metal
0.53 4500
17.1.2 Magnetic Ordering
Nonmagnetic
Unknown
17.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
17.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
17.2 Electrical Properties
17.2.1 Electrical Property
Conductor
Unknown
17.2.2 Resistivity
0.40 nΩ·mNA
Thallium Metal
0.18 961
17.2.3 Electrical Conductivity
0.02 106/cm ΩNA
Plutonium Metal
0.00666 0.63
17.2.4 Electron Affinity
183.30 kJ/molNA
Mercury Metal
0 222.8
18 Thermal
18.1 Specific Heat
0.12 J/(kg K)NA
Americium Metal
0.11 3.6
18.2 Molar Heat Capacity
26.40 J/mol·KNA
Beryllium Metal
16.443 62.7
18.3 Thermal Conductivity
20.00 W/m·KNA
Neptunium Metal
6.3 429
18.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
18.5 Thermal Expansion
23.50 µm/(m·K)NA
Tungsten Metal
4.5 97
18.6 Enthalpy
18.6.1 Enthalpy of Vaporization
60.30 kJ/molNA
Zinc Metal
7.32 799.1
18.6.2 Enthalpy of Fusion
13.00 kJ/molNA
Cesium Metal
2.1 35.23
18.6.3 Enthalpy of Atomization
134.00 kJ/molNA
Mercury Metal
61.5 837
18.7 Standard Molar Entropy
NANA
Beryllium Metal
9.5 198.1