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Ruthenium vs Rubidium

Ruthenium
Rubidium
Rubidium vs Ruthenium


Periodic Table
Symbol
Ru   
Rb   
Group Number
8   
10
1   
17
Period Number
5   
5   
Block
d block   
s block   
Element Family
Transition Metal   
Alkali   
CAS Number
7440188   
99+
7440177   
99+
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • Ruthenium element has been extracted from used nuclear fuel.
  • Ruthenium metal also produces as a by-product of the Nickel mining.
  
  • Rubidium metal is 16th most common element found in the earth crust.
  • Rubidium metal also found in minerals as well as seawater.
  
Sources
By-product of Nickel Refining, Found in Minerals, Mining   
Obtained from Lithium Production.   
History
  
  
Who Discovered
Karl Ernst Claus   
Robert Bunsen and Gustav Kirchhoff   
Discovery
In 1844   
In 1861   
Abundance
  
  
Abundance In Universe
4 * 10-7 %   
20
1 * 10-6 %   
16
Abundance In Sun
~0.0000005 %   
22
~0.000003 %   
17
Abundance In Meteorites
0.00 %   
26
0.00 %   
19
Abundance In Earth's Crust
0.00 %   
99+
0.01 %   
18
Abundance In Oceans
0.00 %   
38
0.00 %   
7
Abundance In Humans
Not Available   
0.00 %   
7
Uses
Uses & Benefits
  • It is used for producing chip resistors and contact.
  • Ruthenium oxide is used to coat the anodes cells for chlorine production in chemical industry. It also works as catalysts for ammonia and acetic acid reaction.
  
  • 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
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
NA   
Medical Uses
Medical Research   
NA   
Other Uses
Alloys   
Alloys, Research Purposes   
Biological Properties
  
  
Toxicity
Low Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
2.49 Blood/mg dm-3   
7
In Bone
Not Available   
5.00 p.p.m.   
13
Physical Properties
Melting Point
2,250.00 °C   
8
38.89 °C   
99+
Boiling Point
3,900.00 °C   
14
688.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Grayish White   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
6.50   
5
0.30   
24
Brinell Hardness
2,160.00 MPa   
3
0.22 MPa   
99+
Speed of Sound
5,970.00 m/s   
4
1,300.00 m/s   
99+
Optical Properties
  
  
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
Ru   
Rb   
Isotopes
  
  
Known Isotopes
26   
13
29   
10
Electronegativity
  
  
Pauling Electronegativity
2.20   
4
0.82   
99+
Sanderson Electronegativity
Not Available   
0.31   
32
Allred Rochow Electronegativity
1.42   
18
0.89   
40
Mulliken-Jaffe Electronegativity
Not Available   
0.69   
24
Allen Electronegativity
1.54   
25
0.71   
99+
Electropositivity
  
  
Pauling Electropositivity
1.80   
99+
3.18   
3
Ionization Energies
  
  
1st Energy Level
710.20 kJ/mol   
32
403.00 kJ/mol   
99+
2nd Energy Level
710.22 kJ/mol   
99+
2,633.00 kJ/mol   
6
3rd Energy Level
2,747.00 kJ/mol   
37
3,860.00 kJ/mol   
11
4th Energy Level
Not Available   
5,080.00 kJ/mol   
18
5th Energy Level
Not Available   
6,850.00 kJ/mol   
19
6th Energy Level
Not Available   
8,140.00 kJ/mol   
20
7th Energy level
Not Available   
9,570.00 kJ/mol   
20
8th Energy Level
Not Available   
13,120.00 kJ/mol   
17
9th Energy Level
Not Available   
14,500.00 kJ/mol   
18
10th Energy Level
Not Available   
26,740.00 kJ/mol   
6
Electrochemical Equivalent
1.26 g/amp-hr   
99+
3.19 g/amp-hr   
14
Electron Work Function
4.71 eV   
9
2.16 eV   
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
44   
99+
37   
99+
Electron Configuration
[Kr] 4d7 5s1   
[Kr] 5s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
rystal-Structure-of-Ruthenium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
44   
99+
37   
99+
Number of Neutrons
57   
99+
48   
99+
Number of Electrons
44   
99+
37   
99+
Radius of an Atom
  
  
Atomic Radius
134.00 pm   
99+
248.00 pm   
2
Covalent Radius
146.00 pm   
38
220.00 pm   
4
Van der Waals Radius
200.00 pm   
28
303.00 pm   
3
Atomic Weight
101.07 amu   
99+
85.47 amu   
99+
Atomic Volume
8.30 cm3/mol   
99+
55.90 cm3/mol   
2
Adjacent Atomic Numbers
  
  
Previous Element
Technetium
  
Gallium
  
Next Element
Rhodium
  
Strontium
  
Valence Electron Potential
64.00 (-eV)   
22
9.47 (-eV)   
99+
Lattice Constant
270.59 pm   
99+
558.50 pm   
10
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.58   
11
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
12.45 g/cm3   
27
1.53 g/cm3   
99+
Density When Liquid (at m.p.)
10.65 g/cm3   
16
1.46 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)   
23
Not Available   
Elasticity properties
  
  
Shear Modulus
173.00 GPa   
4
Not Available   
Bulk Modulus
220.00 GPa   
7
2.50 GPa   
99+
Young's Modulus
447.00 GPa   
3
2.40 GPa   
99+
Poisson Ratio
0.30   
14
Not Available   
Other Mechanical Properties
Ductile, Malleable   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
12.45   
19
1.53   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
71.00 nΩ·m   
38
128.00 nΩ·m   
26
Electrical Conductivity
0.14 106/cm Ω   
16
0.08 106/cm Ω   
24
Electron Affinity
101.30 kJ/mol   
10
46.90 kJ/mol   
24
Thermal Properties
Specific Heat
0.24 J/(kg K)   
24
0.36 J/(kg K)   
17
Molar Heat Capacity
24.06 J/mol·K   
99+
31.06 J/mol·K   
5
Thermal Conductivity
117.00 W/m·K   
13
58.20 W/m·K   
26
Critical Temperature
Not Available   
2,093.00 K   
4
Thermal Expansion
6.40 µm/(m·K)   
99+
90.00 µm/(m·K)   
2
Enthalpy
  
  
Enthalpy of Vaporization
567.80 kJ/mol   
10
69.20 kJ/mol   
99+
Enthalpy of Fusion
25.50 kJ/mol   
7
2.19 kJ/mol   
99+
Enthalpy of Atomization
603.00 kJ/mol   
9
82.00 kJ/mol   
99+
Standard Molar Entropy
28.50 J/mol.K   
99+
76.80 J/mol.K   
5
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