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Rb Element
Rubidium


Periodic Table
0
Symbol
Rb 0
Group Number
1 17
Period Number
5 3
Block
s block 0
Element Family
Alkali 0
CAS Number
7440177 62
Space Group Name
Im_ 3m 0
Space Group Number
229.00 1
Facts
0
Interesting Facts
  • Rubidium metal is 16th most common element found in the earth crust.
  • Rubidium metal also found in minerals as well as seawater.
0
Sources
Obtained from Lithium Production. 0
History
0
Who Discovered
Robert Bunsen and Gustav Kirchhoff 0
Discovery
In 1861 0
Abundance
0
Abundance In Universe
1 * 10-6 % 16
Abundance In Sun
~0.000003 % 17
Abundance In Meteorites
0.00 % 19
Abundance In Earth's Crust
0.01 % 18
Abundance In Oceans
0.00 % 7
Abundance In Humans
0.00 % 7
Uses
0
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.
0
Industrial Uses
NA 0
Medical Uses
NA 0
Other Uses
Alloys, Research Purposes 0
Biological Properties
0
Toxicity
Non Toxic 0
Present in Human Body
Yes 0
In Blood
2.49 Blood/mg dm-3 7
In Bone
5.00 p.p.m. 13
Physical
0
Melting Point
38.89 °C 78
Boiling Point
688.00 °C 74
Appearance
0
Physical State
Solid 0
Color
Grayish White 0
Luster
NA 0
Hardness
0
Mohs Hardness
0.30 24
Brinell Hardness
0.22 MPa 55
Vickers Hardness
Not Available 0
Speed of Sound
1,300.00 m/s 50
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Rb 0
Isotopes
0
Known Isotopes
29 10
Electronegativity
0
Pauling Electronegativity
0.82 51
Sanderson Electronegativity
0.31 32
Allred Rochow Electronegativity
0.89 40
Mulliken-Jaffe Electronegativity
0.69 24
Allen Electronegativity
0.71 46
Electropositivity
0
Pauling Electropositivity
3.18 3
Ionization Energies
0
1st Energy Level
403.00 kJ/mol 88
2nd Energy Level
2,633.00 kJ/mol 6
3rd Energy Level
3,860.00 kJ/mol 11
4th Energy Level
5,080.00 kJ/mol 18
5th Energy Level
6,850.00 kJ/mol 19
6th Energy Level
8,140.00 kJ/mol 20
7th Energy level
9,570.00 kJ/mol 20
8th Energy Level
13,120.00 kJ/mol 17
9th Energy Level
14,500.00 kJ/mol 18
10th Energy Level
26,740.00 kJ/mol 6
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
3.19 g/amp-hr 14
Electron Work Function
2.16 eV 45
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity 0
Atomic
0
Atomic Number
37 75
Electron Configuration
[Kr] 5s1 0
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Atom
0
Number of Protons
37 74
Number of Neutrons
48 56
Number of Electrons
37 74
Radius of an Atom
0
Atomic Radius
248.00 pm 2
Covalent Radius
220.00 pm 4
Van der Waals Radius
303.00 pm 3
Atomic Weight
85.47 amu 69
Atomic Volume
55.90 cm3/mol 2
Adjacent Atomic Numbers
0
Previous Element
24 0
Next Element
37 0
Valence Electron Potential
9.47 (-eV) 65
Lattice Constant
558.50 pm 10
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
1.53 g/cm3 81
Density When Liquid (at m.p.)
1.46 g/cm3 56
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
Not Available 0
Elasticity properties
0
Shear Modulus
Not Available 0
Bulk Modulus
2.50 GPa 49
Young's Modulus
2.40 GPa 57
Poisson Ratio
Not Available 0
Other Mechanical Properties
Ductile 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
1.53 67
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Conductor 0
Resistivity
128.00 nΩ·m 26
Electrical Conductivity
0.08 106/cm Ω 24
Electron Affinity
46.90 kJ/mol 24
Thermal
0
Specific Heat
0.36 J/(kg K) 17
Molar Heat Capacity
31.06 J/mol·K 5
Thermal Conductivity
58.20 W/m·K 26
Critical Temperature
2,093.00 K 4
Thermal Expansion
90.00 µm/(m·K) 2
Enthalpy
0
Enthalpy of Vaporization
69.20 kJ/mol 56
Enthalpy of Fusion
2.19 kJ/mol 62
Enthalpy of Atomization
82.00 kJ/mol 59
Standard Molar Entropy
76.80 J/mol.K 5
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