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Rubidium
Rubidium




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What is Rubidium?

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1 Periodic Table

1.1 Symbol

Rb

1.2 Group Number

1
Rank: 17 (Overall)
Gadolinium
0 17

1.3 Period Number

5
Rank: 3 (Overall)
Lithium
2 7

1.4 Block

s block

1.5 Element Family

Alkali

1.6 CAS Number

7440177
Rank: 62 (Overall)
Aluminium
7429905 54386242

1.7 Space Group Name

Im_ 3m

1.8 Space Group Number

229.00
Rank: 1 (Overall)
Plutonium
11 229

2 Facts

2.1 Interesting Facts

  • Rubidium metal is 16th most common element found in the earth crust.
  • Rubidium metal also found in minerals as well as seawater.

2.2 Sources

Obtained from Lithium Production.

2.3 History

2.3.1 Who Discovered

Robert Bunsen and Gustav Kirchhoff

2.3.2 Discovery

In 1861

2.4 Abundance

2.4.1 Abundance In Universe

1 * 10-6 %
Rank: 16 (Overall)
Thallium
5E-09 0.11

2.4.2 Abundance In Sun

~0.000003 %
Rank: 17 (Overall)
Beryllium
1E-08 0.1

2.4.3 Abundance In Meteorites

0.00 %
Rank: 19 (Overall)
Gold
1.7E-07 22

2.4.4 Abundance In Earth's Crust

0.01 %
Rank: 18 (Overall)
Radium
9.9E-12 8.1

2.4.5 Abundance In Oceans

0.00 %
Rank: 7 (Overall)
Protactinium
2E-23 1.1

2.4.6 Abundance In Humans

0.00 %
Rank: 7 (Overall)
Radium
1E-13 1.4

3 Uses

3.1 Uses & Benefits

  • Rubidium's main application is in the glass manufacturing.
  • Rubidium can very easily get ionized and hence it is used for ion engines, but it is still less efficient than that of Caesium.

3.1.1 Industrial Uses

NA

3.1.2 Medical Uses

NA

3.1.3 Other Uses

Alloys, Research Purposes

3.2 Biological Properties

3.2.1 Toxicity

Non Toxic

3.2.2 Present in Human Body

83% - Alkali Metals Metals have it !

3.2.3 In Blood

2.49 Blood/mg dm-3
Rank: 7 (Overall)
Plutonium
0 1970

3.2.4 In Bone

5.00 p.p.m.
Rank: 13 (Overall)
Plutonium
0 170000

4 Physical

4.1 Melting Point

38.89 °C
Rank: 78 (Overall)
Francium
27 3410

4.2 Boiling Point

688.00 °C
Rank: 74 (Overall)
Flerovium
147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Grayish White

4.3.3 Luster

NA

4.4 Hardness

4.4.1 Mohs Hardness

0.30
Rank: 24 (Overall)
Cesium
0.2 8.5

4.4.2 Brinell Hardness

0.22 MPa
Rank: 55 (Overall)
Cesium
0.14 3490

4.4.3 Vickers Hardness

Not Available
Rank: N/A (Overall)
Palladium
121 3430

4.5 Speed of Sound

1,300.00 m/s
Rank: 50 (Overall)
Thallium
818 16200

4.6 Optical Properties

4.6.1 Refractive Index

Not Available
Rank: N/A (Overall)
Mercury
1.000933 1.7229

4.6.2 Reflectivity

Not Available
Rank: N/A (Overall)
Molybdenum
58 97

4.7 Allotropes

No - Alkali Metals Metals has it !

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

Rb

5.2 Isotopes

5.2.1 Known Isotopes

29
Rank: 10 (Overall)
Tennessine
0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

0.82
Rank: 51 (Overall)
Francium
0.7 2.54

5.3.2 Sanderson Electronegativity

0.31
Rank: 32 (Overall)
Cesium
0.22 2.56

5.3.3 Allred Rochow Electronegativity

0.89
Rank: 40 (Overall)
Cesium
0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

0.69
Rank: 24 (Overall)
Cesium
0.62 2.48

5.3.5 Allen Electronegativity

0.71
Rank: 46 (Overall)
Cesium
0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

3.18
Rank: 3 (Overall)
Gold
1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

403.00 kJ/mol
Rank: 88 (Overall)
Cesium
375.7 26130

5.5.2 2nd Energy Level

2,633.00 kJ/mol
Rank: 6 (Overall)
Ruthenium
710.2162 28750

5.5.3 3rd Energy Level

3,860.00 kJ/mol
Rank: 11 (Overall)
Osmium
1600 34230

5.5.4 4th Energy Level

5,080.00 kJ/mol
Rank: 18 (Overall)
Thorium
2780 37066

5.5.5 5th Energy Level

6,850.00 kJ/mol
Rank: 19 (Overall)
Dubnium
4305.2 97510

5.5.6 6th Energy Level

8,140.00 kJ/mol
Rank: 20 (Overall)
Seaborgium
5715.8 105800

5.5.7 7th Energy level

9,570.00 kJ/mol
Rank: 20 (Overall)
Bohrium
7226.8 114300

5.5.8 8th Energy Level

13,120.00 kJ/mol
Rank: 17 (Overall)
Hassium
8857.4 125300

5.5.9 9th Energy Level

14,500.00 kJ/mol
Rank: 18 (Overall)
Yttrium
14110 134700

5.5.10 10th Energy Level

26,740.00 kJ/mol
Rank: 6 (Overall)
Strontium
17100 144300

5.5.11 11th Energy Level

Not Available
Rank: N/A (Overall)
Yttrium
19900 169988

5.5.12 12th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
22219 189368

5.5.13 13th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
26930 76015

5.5.14 14th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
29196 86450

5.5.15 15th Energy Level

Not Available
Rank: N/A (Overall)
Manganese
41987 97510

5.5.16 16th Energy Level

Not Available
Rank: N/A (Overall)
Iron
47206 109480

5.5.17 17th Energy Level

Not Available
Rank: N/A (Overall)
Cobalt
52737 122200

5.5.18 18th Energy Level

Not Available
Rank: N/A (Overall)
Nickel
58570 134810

5.5.19 19th Energy Level

Not Available
Rank: N/A (Overall)
Copper
64702 148700

5.5.20 20th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
80400 171200

5.5.21 21st Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
87000 179100

5.5.22 22nd Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
93400 184900

5.5.23 23rd Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
98420 198800

5.5.24 24th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
104400 195200

5.5.25 25th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
121900 121900

5.5.26 26th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
127700 127700

5.5.27 27th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
133800 133800

5.5.28 28th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
139800 139800

5.5.29 29th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
148100 148100

5.5.30 30th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum
154500 154500

5.6 Electrochemical Equivalent

3.19 g/amp-hr
Rank: 14 (Overall)
Beryllium
0.16812 8.3209

5.7 Electron Work Function

2.16 eV
Rank: 45 (Overall)
Cesium
2.14 5.65

5.8 Other Chemical Properties

Corrosion, Ionization, Radioactive Isotopes, Radioactivity

6 Atomic

6.1 Atomic Number

37
Rank: 75 (Overall)
Lithium
3 117

6.2 Electron Configuration

[Kr] 5s1

6.3 Crystal Structure

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

37
Rank: 74 (Overall)
Lithium
3 117

6.4.2 Number of Neutrons

48
Rank: 56 (Overall)
Lithium
4 184

6.4.3 Number of Electrons

37
Rank: 74 (Overall)
Lithium
3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

248.00 pm
Rank: 2 (Overall)
Beryllium
112 265

6.5.2 Covalent Radius

220.00 pm
Rank: 4 (Overall)
Beryllium
96 260

6.5.3 Van der Waals Radius

303.00 pm
Rank: 3 (Overall)
Zinc
139 348

6.6 Atomic Weight

85.47 amu
Rank: 69 (Overall)
Lithium
6.94 294

6.7 Atomic Volume

55.90 cm3/mol
Rank: 2 (Overall)
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

9.47 (-eV)
Rank: 65 (Overall)
Francium
8 392.42

6.10 Lattice Constant

558.50 pm
Rank: 10 (Overall)
Beryllium
228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

Not Available
Rank: N/A (Overall)
Beryllium
1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

1.53 g/cm3
Rank: 81 (Overall)
Lithium
0.534 40.7

7.1.2 Density When Liquid (at m.p.)

1.46 g/cm3
Rank: 56 (Overall)
Lithium
0.512 20

7.2 Tensile Strength

Not Available
Rank: N/A (Overall)
Indium
2.5 11000

7.3 Viscosity

Not Available
Rank: N/A (Overall)
Mercury
0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

Not Available
Rank: N/A (Overall)
Cerium
2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

Not Available
Rank: N/A (Overall)
Tungsten
2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

Not Available
Rank: N/A (Overall)
Potassium
1.3 222

7.5.2 Bulk Modulus

2.50 GPa
Rank: 49 (Overall)
Cesium
1.6 462

7.5.3 Young's Modulus

2.40 GPa
Rank: 57 (Overall)
Cesium
1.7 528

7.6 Poisson Ratio

Not Available
Rank: N/A (Overall)
Beryllium
0.032 0.47

7.7 Other Mechanical Properties

Ductile

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

1.53
Rank: 67 (Overall)
Lithium
0.53 4500

8.1.2 Magnetic Ordering

Paramagnetic

8.1.3 Permeability

Not Available
Rank: N/A (Overall)
Bismuth
1.25643E-06 0.0063

8.1.4 Susceptibility

Not Available
Rank: N/A (Overall)
Bismuth
-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Conductor

8.2.2 Resistivity

128.00 nΩ·m
Rank: 26 (Overall)
Thallium
0.18 961

8.2.3 Electrical Conductivity

0.08 106/cm Ω
Rank: 24 (Overall)
Plutonium
0.00666 0.63

8.2.4 Electron Affinity

46.90 kJ/mol
Rank: 24 (Overall)
Mercury
0 222.8

9 Thermal

9.1 Specific Heat

0.36 J/(kg K)
Rank: 17 (Overall)
Americium
0.11 3.6

9.2 Molar Heat Capacity

31.06 J/mol·K
Rank: 5 (Overall)
Beryllium
16.443 62.7

9.3 Thermal Conductivity

58.20 W/m·K
Rank: 26 (Overall)
Neptunium
6.3 429

9.4 Critical Temperature

2,093.00 K
Rank: 4 (Overall)
Ytterbium
26.3 3223

9.5 Thermal Expansion

90.00 µm/(m·K)
Rank: 2 (Overall)
Tungsten
4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

69.20 kJ/mol
Rank: 56 (Overall)
Zinc
7.32 799.1

9.6.2 Enthalpy of Fusion

2.19 kJ/mol
Rank: 62 (Overall)
Cesium
2.1 35.23

9.6.3 Enthalpy of Atomization

82.00 kJ/mol
Rank: 59 (Overall)
Mercury
61.5 837

9.7 Standard Molar Entropy

76.80 J/mol.K
Rank: 5 (Overall)
Beryllium
9.5 198.1