Bohrium

Cesium

Bohrium vs Cesium

Bohrium

Cesium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

0 17

1.3 Period Number

2 7

1.4 Block

d block

s block

1.5 Element Family

Transition Metal

Alkali

1.6 CAS Number

540371487440462

7429905 54386242

1.7 Space Group Name

Not Available

Im_ 3m

1.8 Space Group Number

NA229.00

11 229

2 Facts

2.1 Interesting Facts

Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).

Not Available

2.2 Sources

Found in Minerals, Mining, Synthetically Produced

Earth's crust, Found in Minerals, Mining, Ores of Minerals

2.3 History

2.3.1 Who Discovered

Gesellschaft für Schwerionenforschung

Robert Bunsen and Gustav Kirchhoff

2.3.2 Discovery

In 1981

In 1860

2.4 Abundance

2.4.1 Abundance In Universe

NA8 * 10^-8 %

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~0.0000008 %

1E-08 0.1

2.4.3 Abundance In Meteorites

NA0.00 %

1.7E-07 22

2.4.4 Abundance In Earth's Crust

NA0.00 %

9.9E-12 8.1

2.4.5 Abundance In Oceans

NA0.00 %

2E-23 1.1

2.4.6 Abundance In Humans

NA0.00 %

1E-13 1.4

3 Uses

3.1 Uses & Benefits

Currently known uses of Bohrium metal are limited to research purpose only.

The most common use of cesium metal is as a drilling fluid. It is also used in optical glass manufacturing.
In vacuum tubes and radiation monitor equipment this metal is used as a catalyst promoter.

3.1.1 Industrial Uses

Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry

3.1.2 Medical Uses

3.1.3 Other Uses

Research Purposes

Alloys

3.2 Biological Properties

3.2.1 Toxicity

Unknown

Mildly Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

0.00 Blood/mg dm-30.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

0.00 p.p.m.0.05 p.p.m.

0 170000

4 Physical

4.1 Melting Point

NA28.50 °C

27 3410

4.2 Boiling Point

NA678.40 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Unknown

Silvery Gold

4.3.3 Luster

Unknown Luster

4.4 Hardness

4.4.1 Mohs Hardness

NA0.20

0.2 8.5

4.4.2 Brinell Hardness

NA0.14 MPa

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

NANA

818 16200

4.6 Optical Properties

4.6.1 Refractive Index

NANA

1.000933 1.7229

4.6.2 Reflectivity

NANA

58 97

4.7 Allotropes

✔ ✘

4.7.1 α Allotropes

Not Available

4.7.2 β Allotropes

Not Available

4.7.3 γ Allotropes

Not Available

5 Chemical

5.1 Chemical Formula

5.2 Isotopes

5.2.1 Known Isotopes

536

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

NA0.79

0.7 2.54

5.3.2 Sanderson Electronegativity

NA0.22

0.22 2.56

5.3.3 Allred Rochow Electronegativity

NA0.86

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

NA0.62

0.62 2.48

5.3.5 Allen Electronegativity

NA0.66

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

NA3.21

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

742.90 kJ/mol375.70 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

1,688.50 kJ/mol2,234.30 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

2,566.50 kJ/mol3,400.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

3,598.90 kJ/molNA

2780 37066

5.5.5 5th Energy Level

4,727.80 kJ/molNA

4305.2 97510

5.5.6 6th Energy Level

5,991.70 kJ/molNA

5715.8 105800

5.5.7 7th Energy level

7,226.80 kJ/molNA

7226.8 114300

5.5.8 8th Energy Level

NANA

8857.4 125300

5.5.9 9th Energy Level

NANA

14110 134700

5.5.10 10th Energy Level

NANA

17100 144300

5.5.11 11th Energy Level

NANA

19900 169988

5.5.12 12th Energy Level

NANA

22219 189368

5.5.13 13th Energy Level

NANA

26930 76015

5.5.14 14th Energy Level

NANA

29196 86450

5.5.15 15th Energy Level

NANA

41987 97510

5.5.16 16th Energy Level

NANA

47206 109480

5.5.17 17th Energy Level

NANA

52737 122200

5.5.18 18th Energy Level

NANA

58570 134810

5.5.19 19th Energy Level

NANA

64702 148700

5.5.20 20th Energy Level

NANA

80400 171200

5.5.21 21st Energy Level

NANA

87000 179100

5.5.22 22nd Energy Level

NANA

93400 184900

5.5.23 23rd Energy Level

NANA

98420 198800

5.5.24 24th Energy Level

NANA

104400 195200

5.5.25 25th Energy Level

NANA

121900 121900

5.5.26 26th Energy Level

NANA

127700 127700

5.5.27 27th Energy Level

NANA

133800 133800

5.5.28 28th Energy Level

NANA

139800 139800

5.5.29 29th Energy Level

NANA

148100 148100

5.5.30 30th Energy Level

NANA

154500 154500

5.6 Electrochemical Equivalent

NA4.96 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

NA2.14 eV

2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes

Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility

6 Atomic

6.1 Atomic Number

10755

3 117

6.2 Electron Configuration

[Rn] 5f¹⁴ 6d⁵ 7s²

[Xe] 6s¹

6.3 Crystal Structure

Hexagonal Close Packed (HCP)

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

10755

3 117

6.4.2 Number of Neutrons

15578

4 184

6.4.3 Number of Electrons

10755

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

128.00 pm265.00 pm

112 265

6.5.2 Covalent Radius

141.00 pm244.00 pm

96 260

6.5.3 Van der Waals Radius

NA343.00 pm

139 348

6.6 Atomic Weight

270.00 amu132.91 amu

6.94 294

6.7 Atomic Volume

NA71.07 cm3/mol

1.39 71.07

6.8 Adjacent Atomic Numbers

6.8.1 Previous Element

6.8.2 Next Element

6.9 Valence Electron Potential

NA8.62 (-eV)

8 392.42

6.10 Lattice Constant

NA614.10 pm

228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

NANA

1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

37.10 g/cm³1.93 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

NA1.84 g/cm3

0.512 20

7.2 Tensile Strength

NANA

2.5 11000

7.3 Viscosity

NANA

0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

NANA

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

NANA

1.3 222

7.5.2 Bulk Modulus

NA1.60 GPa

1.6 462

7.5.3 Young's Modulus

NA1.70 GPa

1.7 528

7.6 Poisson Ratio

NANA

0.032 0.47

7.7 Other Mechanical Properties

Unknown

Ductile

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

NA1.87

0.53 4500

8.1.2 Magnetic Ordering

Unknown

Paramagnetic

8.1.3 Permeability

NANA

1.25643E-06 0.0063

8.1.4 Susceptibility

NANA

-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Unknown

Semiconductor

8.2.2 Resistivity

NA205.00 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

NA0.05 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

NA45.50 kJ/mol

0 222.8

9 Thermal

9.1 Specific Heat

NA0.24 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

NA32.21 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

NA35.90 W/m·K

6.3 429

9.4 Critical Temperature

NA1,938.00 K

26.3 3223

9.5 Thermal Expansion

NA97.00 µm/(m·K)

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

NA65.90 kJ/mol

7.32 799.1

9.6.2 Enthalpy of Fusion

NA2.10 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

NA78.20 kJ/mol

61.5 837

9.7 Standard Molar Entropy

NA85.20 J/mol.K

9.5 198.1

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