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Gallium Rubidium Comparison

Gallium
Rubidium
Rubidium Gallium comparison


Periodic Table
Symbol
Ga  
Rb  
Group Number
13  
5
1  
17
Period Number
4  
5  
Block
p block  
s block  
Element Family
Post-​Transition  
Alkali  
CAS Number
7440553  
32
7440177  
99+
Space Group Name
Cmca  
Im_ 3m  
Space Group Number
64.00  
12
229.00  
2
Facts
Interesting Facts
  • A gram of Gallium metal can be bought for only three dollars.
  • Gallium metal found in ores of following things Coal, Bauxite, Diaspore, Sphalerite, Germanite and Zinc.
  
  • Rubidium metal is 16th most common element found in the earth crust.
  • Rubidium metal also found in minerals as well as seawater.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
Obtained from Lithium Production.  
History
  
  
Who Discovered
Lecoq de Boisbaudran  
Robert Bunsen and Gustav Kirchhoff  
Discovery
In 1875  
In 1861  
Abundance
  
  
Abundance In Universe
0.00 %  
17
0.00 %  
17
Abundance In Sun
0.00 %  
16
0.00 %  
17
Abundance In Meteorites
0.00 %  
16
0.00 %  
19
Abundance In Earth's Crust
0.00 %  
24
0.01 %  
18
Abundance In Oceans
0.00 %  
22
0.00 %  
7
Abundance In Humans
0.00 %  
24
0.00 %  
8
Uses
Uses & Benefits
  • Gallium arsenide is a very important component of many semiconductors and led manufacturing.
  • Gallium nitride is also know as a semiconductor and it is used in Blu-ray technology, mobile smartphones and LED.
  
  • 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.
  
Industrial Uses
Electrical Industry, Electronic Industry  
-  
Medical Uses
Surgical Instruments Manufacturing  
-  
Other Uses
Alloys  
Alloys, Research Purposes  
Biological Properties
  
  
Toxicity
Non Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.08 Blood/mg dm-3  
13
2.49 Blood/mg dm-3  
7
In Bone
0.00 p.p.m.  
99+
5.00 p.p.m.  
13
Physical
Melting Point
29.78 °C  
99+
38.89 °C  
99+
Boiling Point
2,403.00 °C  
99+
688.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Grayish White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
1.50  
19
0.30  
26
Brinell Hardness
56.80 MPa  
99+
0.22 MPa  
99+
Vickers Hardness
111.00 MPa  
99+
0.22 MPa  
99+
Speed of Sound
2,740.00 m/s  
99+
1,300.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.81  
20
1.54  
35
Reflectivity
36.00 %  
33
52.00 %  
29
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ga  
Rb  
Isotopes
  
  
Known Isotopes
24  
15
29  
10
Electronegativity
  
  
Pauling Electronegativity
1.81  
16
0.82  
99+
Sanderson Electronegativity
2.42  
2
0.31  
99+
Allred Rochow Electronegativity
1.82  
2
0.89  
99+
Mulliken-Jaffe Electronegativity
2.01  
9
0.69  
99+
Allen Electronegativity
1.76  
17
0.71  
99+
Electropositivity
  
  
Pauling Electropositivity
2.19  
40
3.18  
3
Ionization Energies
  
  
1st Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
2nd Energy Level
1,979.30 kJ/mol  
13
2,633.00 kJ/mol  
6
3rd Energy Level
2,963.00 kJ/mol  
28
3,860.00 kJ/mol  
11
4th Energy Level
6,180.00 kJ/mol  
16
5,080.00 kJ/mol  
28
5th Energy Level
5,787.00 kJ/mol  
99+
6,850.00 kJ/mol  
31
6th Energy Level
5,787.00 kJ/mol  
99+
8,140.00 kJ/mol  
31
7th Energy level
5,780.00 kJ/mol  
99+
9,570.00 kJ/mol  
20
8th Energy Level
5,780.00 kJ/mol  
99+
13,120.00 kJ/mol  
17
9th Energy Level
5,787.00 kJ/mol  
99+
14,500.00 kJ/mol  
18
10th Energy Level
5,787.00 kJ/mol  
99+
26,740.00 kJ/mol  
6
11th Energy Level
5,780.00 kJ/mol  
99+
4,030.00 kJ/mol  
99+
12th Energy Level
57,800.00 kJ/mol  
20
4,030.00 kJ/mol  
99+
13th Energy Level
5,780.00 kJ/mol  
99+
4,030.00 kJ/mol  
99+
14th Energy Level
578.00 kJ/mol  
99+
4,030.00 kJ/mol  
99+
15th Energy Level
57,800.00 kJ/mol  
99+
40,300.00 kJ/mol  
99+
16th Energy Level
57,800.00 kJ/mol  
99+
40,300.00 kJ/mol  
99+
17th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
18th Energy Level
5,787.00 kJ/mol  
99+
4,030.00 kJ/mol  
99+
19th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
20th Energy Level
578.00 kJ/mol  
99+
403.00 kJ/mol  
99+
21st Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
22nd Energy Level
578.00 kJ/mol  
99+
403.00 kJ/mol  
99+
23rd Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
24th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
25th Energy Level
578.00 kJ/mol  
99+
403.00 kJ/mol  
99+
26th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
27th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
28th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
29th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
30th Energy Level
578.80 kJ/mol  
99+
403.00 kJ/mol  
99+
Electrochemical Equivalent
0.87 g/amp-hr  
99+
3.19 g/amp-hr  
16
Electron Work Function
4.20 eV  
30
2.16 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes  
Corrosion, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
31  
99+
37  
99+
Electron Configuration
[Ar] 3d10 4s2 4p1  
[Kr] 5s1  
Crystal Structure
Orthorhombic (ORTH)  
Body Centered Cubic (BCC)  
Crystal Lattice
ORTH-Crystal-Structure-of-Gallium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
31  
99+
37  
99+
Number of Neutrons
39  
99+
48  
99+
Number of Electrons
31  
99+
37  
99+
Radius of an Atom
  
  
Atomic Radius
135.00 pm  
99+
248.00 pm  
3
Covalent Radius
122.00 pm  
99+
220.00 pm  
4
Van der Waals Radius
187.00 pm  
39
303.00 pm  
4
Atomic Weight
69.72 amu  
99+
85.47 amu  
99+
Atomic Volume
11.80 cm3/mol  
99+
55.90 cm3/mol  
3
Adjacent Atomic Numbers
  
  
Previous Element
Zinc
  
Gallium
  
Next Element
Rubidium
  
Strontium
  
Valence Electron Potential
69.70 (-eV)  
19
9.47 (-eV)  
99+
Lattice Constant
451.97 pm  
20
558.50 pm  
11
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.30  
99+
1.59  
28
Mechanical
Density
  
  
Density At Room Temperature
5.91 g/cm3  
99+
1.53 g/cm3  
99+
Density When Liquid (at m.p.)
6.10 g/cm3  
99+
1.46 g/cm3  
99+
Tensile Strength
41.00 MPa  
99+
30.00 MPa  
99+
Viscosity
0.00  
23
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
15
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
35
Elasticity properties
  
  
Shear Modulus
7.20 GPa  
99+
2.50 GPa  
99+
Bulk Modulus
37.30 GPa  
99+
2.50 GPa  
99+
Young's Modulus
9.80 GPa  
99+
2.40 GPa  
99+
Poisson Ratio
0.47  
1
0.37  
7
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.91  
99+
1.53  
99+
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
11
Susceptibility
0.00  
7
0.00  
24
Electrical Properties
  
  
Electrical Property
Semiconductor  
Conductor  
Resistivity
270.00 nΩ·m  
15
128.00 nΩ·m  
26
Electrical Conductivity
0.07 106/cm Ω  
34
0.08 106/cm Ω  
29
Electron Affinity
28.90 kJ/mol  
37
46.90 kJ/mol  
29
Thermal
Specific Heat
0.37 J/(kg K)  
16
0.36 J/(kg K)  
17
Molar Heat Capacity
25.86 J/mol·K  
99+
31.06 J/mol·K  
7
Thermal Conductivity
40.60 W/m·K  
34
58.20 W/m·K  
26
Critical Temperature
302.00 K  
99+
2,093.00 K  
18
Thermal Expansion
18.00 µm/(m·K)  
26
90.00 µm/(m·K)  
2
Enthalpy
  
  
Enthalpy of Vaporization
256.10 kJ/mol  
99+
69.20 kJ/mol  
99+
Enthalpy of Fusion
5.59 kJ/mol  
99+
2.19 kJ/mol  
99+
Enthalpy of Atomization
276.10 kJ/mol  
99+
82.00 kJ/mol  
99+
Standard Molar Entropy
40.80 J/mol.K  
99+
76.80 J/mol.K  
5
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