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Rubidium Mercury Comparison

Rubidium
Mercury
Mercury Rubidium comparison


Periodic Table
Symbol
Rb   
Hg   
Group Number
1   
17
12   
6
Period Number
5   
6   
Block
s block   
d block   
Element Family
Alkali   
Transition Metal   
CAS Number
7440177   
99+
7439976   
99+
Space Group Name
Im_ 3m   
R_ 3m   
Space Group Number
229.00   
1
166.00   
6
Facts
Interesting Facts
  • Rubidium metal is 16th most common element found in the earth crust.
  • Rubidium metal also found in minerals as well as seawater.
  
  • At room temperature mercury is found in a liquid state.
  • A coin of pound or rupees floats in mercury.
  • Because of its low melting point and boiling point it is used in thermometers.
  
Sources
Obtained from Lithium Production.   
Mining, Ores of Minerals   
History
  
  
Who Discovered
Robert Bunsen and Gustav Kirchhoff   
Ancient Chinese and Indians   
Discovery
In 1861   
Before 2000 BCE   
Abundance
  
  
Abundance In Universe
1 * 10-6 %   
16
Not Available   
Abundance In Sun
~0.000003 %   
17
~-9999 %   
Abundance In Meteorites
0.00 %   
19
Not Available   
Abundance In Earth's Crust
0.01 %   
18
0.05 %   
9
Abundance In Oceans
0.00 %   
7
Not Available   
Abundance In Humans
0.00 %   
7
Not Available   
Uses
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.
  
  • It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
  • It is manly used as a catalysts in chemical industry.
  
Industrial Uses
NA   
Electrical Industry, Electronic Industry   
Medical Uses
NA   
Dentistry   
Other Uses
Alloys, Research Purposes   
Alloys, Mirror Manufacturing, Pharmaceutical Industry   
Biological Properties
  
  
Toxicity
Non Toxic   
Highly Toxic   
Present in Human Body
Yes   
Yes   
In Blood
2.49 Blood/mg dm-3   
7
0.01 Blood/mg dm-3   
23
In Bone
5.00 p.p.m.   
13
0.45 p.p.m.   
19
Physical Properties
Melting Point
38.89 °C   
99+
Not Available   
Boiling Point
688.00 °C   
99+
356.58 °C   
99+
Appearance
  
  
Physical State
Solid   
Liquid   
Color
Grayish White   
Silver   
Luster
NA   
NA   
Hardness
  
  
Mohs Hardness
0.30   
24
Not Available   
Brinell Hardness
0.22 MPa   
99+
Not Available   
Speed of Sound
1,300.00 m/s   
99+
1,451.40 m/s   
99+
Optical Properties
  
  
Refractive Index
Not Available   
1.00   
3
Reflectivity
Not Available   
73.00 %   
8
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Rb   
Hg   
Isotopes
  
  
Known Isotopes
29   
10
34   
5
Electronegativity
  
  
Pauling Electronegativity
0.82   
99+
2.00   
7
Sanderson Electronegativity
0.31   
32
2.20   
7
Allred Rochow Electronegativity
0.89   
40
1.44   
17
Mulliken-Jaffe Electronegativity
0.69   
24
1.81   
9
Allen Electronegativity
0.71   
99+
1.44   
30
Electropositivity
  
  
Pauling Electropositivity
3.18   
3
2.00   
99+
Ionization Energies
  
  
1st Energy Level
403.00 kJ/mol   
99+
1,007.10 kJ/mol   
4
2nd Energy Level
2,633.00 kJ/mol   
6
1,810.00 kJ/mol   
20
3rd Energy Level
3,860.00 kJ/mol   
11
3,300.00 kJ/mol   
20
4th Energy Level
5,080.00 kJ/mol   
18
Not Available   
5th Energy Level
6,850.00 kJ/mol   
19
Not Available   
6th Energy Level
8,140.00 kJ/mol   
20
Not Available   
7th Energy level
9,570.00 kJ/mol   
20
Not Available   
8th Energy Level
13,120.00 kJ/mol   
17
Not Available   
9th Energy Level
14,500.00 kJ/mol   
18
Not Available   
10th Energy Level
26,740.00 kJ/mol   
6
Not Available   
Electrochemical Equivalent
3.19 g/amp-hr   
14
3.74 g/amp-hr   
10
Electron Work Function
2.16 eV   
99+
4.49 eV   
15
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Flammability, Ionization, Solubility   
Atomic Properties
Atomic Number
37   
99+
80   
36
Electron Configuration
[Kr] 5s1   
[Xe] 4f14 5d10 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Rhombohedral (RHO)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
RHO-Crystal-Structure-of-Mercury.jpg#100   
Atom
  
  
Number of Protons
37   
99+
80   
36
Number of Neutrons
48   
99+
121   
22
Number of Electrons
37   
99+
80   
36
Radius of an Atom
  
  
Atomic Radius
248.00 pm   
2
151.00 pm   
32
Covalent Radius
220.00 pm   
4
132.00 pm   
99+
Van der Waals Radius
303.00 pm   
3
155.00 pm   
99+
Atomic Weight
85.47 amu   
99+
200.59 amu   
32
Atomic Volume
55.90 cm3/mol   
2
14.82 cm3/mol   
35
Adjacent Atomic Numbers
  
  
Previous Element
Gallium
  
Gold
  
Next Element
Strontium
  
Thallium
  
Valence Electron Potential
9.47 (-eV)   
99+
28.20 (-eV)   
99+
Lattice Constant
558.50 pm   
10
300.50 pm   
99+
Lattice Angles
π/2, π/2, π/2   
NA   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
1.53 g/cm3   
99+
13.53 g/cm3   
24
Density When Liquid (at m.p.)
1.46 g/cm3   
99+
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
0.00   
1
Vapor Pressure
  
  
Elasticity properties
  
  
Bulk Modulus
2.50 GPa   
99+
Not Available   
Young's Modulus
2.40 GPa   
99+
Not Available   
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
Ductile   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
1.53   
99+
13.53   
16
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
128.00 nΩ·m   
26
961.00 nΩ·m   
1
Electrical Conductivity
0.08 106/cm Ω   
24
0.01 106/cm Ω   
99+
Electron Affinity
46.90 kJ/mol   
24
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
0.36 J/(kg K)   
17
0.14 J/(kg K)   
38
Molar Heat Capacity
31.06 J/mol·K   
5
27.98 J/mol·K   
13
Thermal Conductivity
58.20 W/m·K   
26
8.30 W/m·K   
99+
Critical Temperature
2,093.00 K   
4
1,750.00 K   
6
Thermal Expansion
90.00 µm/(m·K)   
2
60.40 µm/(m·K)   
5
Enthalpy
  
  
Enthalpy of Vaporization
69.20 kJ/mol   
99+
56.90 kJ/mol   
99+
Enthalpy of Fusion
2.19 kJ/mol   
99+
2.29 kJ/mol   
99+
Enthalpy of Atomization
82.00 kJ/mol   
99+
61.50 kJ/mol   
99+
Standard Molar Entropy
76.80 J/mol.K   
5
75.80 J/mol.K   
6
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