Uranium Rubidium Comparison
Periodic Table
Symbol
U
Rb
Group Number
0
18
1
17
Period Number
7
5
Block
f block
s block
Element Family
Actinide
Alkali
CAS Number
7440611
28
7440177
99+
Space Group Name
Cmcm
Im_ 3m
Space Group Number
63.00
10
229.00
1
Facts
Interesting Facts
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
- 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, Mining, Ores of Minerals
Obtained from Lithium Production.
History
Who Discovered
Not Available
Robert Bunsen and Gustav Kirchhoff
Discovery
In 1789
In 1861
Abundance
Abundance In Universe
2 * 10-8 %
29
1 * 10-6 %
16
Abundance In Sun
~0.0000001 %
26
~0.000003 %
17
Abundance In Meteorites
0.00 %
99+
0.00 %
19
Abundance In Earth's Crust
0.00 %
36
0.01 %
18
Abundance In Oceans
0.00 %
11
0.00 %
7
Abundance In Humans
Not Available
0.00 %
7
Uses
Uses & Benefits
- The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
- Synthetic elements like transuranium are made from Uranium metal.
- 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
Ammunition Industry, Chemical Industry
NA
Medical Uses
NA
NA
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
Alloys, Research Purposes
Biological Properties
Toxicity
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
1,132.00 °C
39
38.89 °C
99+
Boiling Point
3,818.00 °C
16
688.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Grayish White
Luster
Metallic
NA
Hardness
Mohs Hardness
6.00
6
0.30
24
Brinell Hardness
2,350.00 MPa
2
0.22 MPa
99+
Vickers Hardness
1,960.00 MPa
2
Not Available
Speed of Sound
3,155.00 m/s
25
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
U
Rb
Isotopes
Known Isotopes
25
14
29
10
Electronegativity
Pauling Electronegativity
1.38
28
0.82
99+
Sanderson Electronegativity
Not Available
0.31
32
Allred Rochow Electronegativity
1.22
26
0.89
40
Mulliken-Jaffe Electronegativity
Not Available
0.69
24
Allen Electronegativity
Not Available
0.71
99+
Electropositivity
Pauling Electropositivity
2.62
26
3.18
3
Ionization Energies
1st Energy Level
597.60 kJ/mol
99+
403.00 kJ/mol
99+
2nd Energy Level
1,420.00 kJ/mol
99+
2,633.00 kJ/mol
6
3rd Energy Level
1,900.00 kJ/mol
99+
3,860.00 kJ/mol
11
4th Energy Level
3,145.00 kJ/mol
99+
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
1.48 g/amp-hr
99+
3.19 g/amp-hr
14
Electron Work Function
3.63 eV
30
2.16 eV
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
92
26
37
99+
Electron Configuration
[Rn] 5f3 6d1 7s2
[Kr] 5s1
Crystal Structure
Orthorhombic (ORTH)
Body Centered Cubic (BCC)
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
92
26
37
99+
Number of Neutrons
146
13
48
99+
Number of Electrons
92
26
37
99+
Radius of an Atom
Atomic Radius
156.00 pm
29
248.00 pm
2
Covalent Radius
196.00 pm
14
220.00 pm
4
Van der Waals Radius
186.00 pm
33
303.00 pm
3
Atomic Weight
238.03 amu
21
85.47 amu
99+
Atomic Volume
12.59 cm3/mol
40
55.90 cm3/mol
2
Adjacent Atomic Numbers
Valence Electron Potential
170.00 (-eV)
4
9.47 (-eV)
99+
Lattice Constant
295.08 pm
99+
558.50 pm
10
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
19.10 g/cm3
17
1.53 g/cm3
99+
Density When Liquid (at m.p.)
17.30 g/cm3
7
1.46 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.01 (Pa)
20
Not Available
Elasticity properties
Shear Modulus
111.00 GPa
10
Not Available
Bulk Modulus
100.00 GPa
16
2.50 GPa
99+
Young's Modulus
208.00 GPa
10
2.40 GPa
99+
Poisson Ratio
0.23
30
Not Available
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
18.80
10
1.53
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Conductor
Resistivity
0.28 nΩ·m
99+
128.00 nΩ·m
26
Electrical Conductivity
0.04 106/cm Ω
37
0.08 106/cm Ω
24
Electron Affinity
Not Available
46.90 kJ/mol
24
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.36 J/(kg K)
17
Molar Heat Capacity
27.67 J/mol·K
15
31.06 J/mol·K
5
Thermal Conductivity
27.50 W/m·K
40
58.20 W/m·K
26
Critical Temperature
Not Available
2,093.00 K
4
Thermal Expansion
13.90 µm/(m·K)
27
90.00 µm/(m·K)
2
Enthalpy
Enthalpy of Vaporization
477.00 kJ/mol
13
69.20 kJ/mol
99+
Enthalpy of Fusion
15.48 kJ/mol
19
2.19 kJ/mol
99+
Enthalpy of Atomization
489.50 kJ/mol
14
82.00 kJ/mol
99+
Standard Molar Entropy
50.20 J/mol.K
31
76.80 J/mol.K
5
|
||
|
||
|
