Uranium Barium Comparison
Periodic Table
Symbol
U
Ba
Group Number
0
18
2
16
Period Number
7
6
Block
f block
s block
Element Family
Actinide
Alkaline Earth
CAS Number
7440611
28
7440393
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.
- Barium oxidizes very easily in the air.
- All toxic compounds of Barium can easily dissolve in water.
- Barium carbonate is used to produce a Rat poison and its other compound Barium nitrate is used in fireworks to produce green color.
Sources
Earth's crust, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Not Available
Carl Wilhelm Scheele
Discovery
In 1789
In 1772
Abundance
Abundance In Universe
2 * 10-8 %
29
1 * 10-6 %
16
Abundance In Sun
~0.0000001 %
26
~0.000001 %
18
Abundance In Meteorites
0.00 %
99+
0.00 %
20
Abundance In Earth's Crust
0.00 %
36
0.03 %
11
Abundance In Oceans
0.00 %
11
0.00 %
8
Abundance In Humans
Not Available
0.00 %
12
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.
- It is sued in chemical paint manufacturing and glass manufacturing.
- Compounds of this metal are toxic; but still the barium sulfate is insoluble and given to patients suffering from digestive disorder.
Industrial Uses
Ammunition Industry, Chemical Industry
Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
Alloys
Biological Properties
Toxicity
Toxic
Low Toxic
Present in Human Body
No
Yes
In Blood
Not Available
0.07 Blood/mg dm-3
15
In Bone
Not Available
70.00 p.p.m.
9
Physical Properties
Melting Point
1,132.00 °C
39
725.00 °C
99+
Boiling Point
3,818.00 °C
16
1,140.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery Gray
Luster
Metallic
NA
Hardness
Mohs Hardness
6.00
6
1.25
19
Brinell Hardness
2,350.00 MPa
2
Not Available
Vickers Hardness
1,960.00 MPa
2
Not Available
Speed of Sound
3,155.00 m/s
25
1,620.00 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
Ba
Isotopes
Known Isotopes
25
14
37
2
Electronegativity
Pauling Electronegativity
1.38
28
0.89
99+
Sanderson Electronegativity
Not Available
0.68
28
Allred Rochow Electronegativity
1.22
26
0.97
38
Mulliken-Jaffe Electronegativity
Not Available
0.88
22
Allen Electronegativity
Not Available
0.88
99+
Electropositivity
Pauling Electropositivity
2.62
26
3.11
4
Ionization Energies
1st Energy Level
597.60 kJ/mol
99+
502.90 kJ/mol
99+
2nd Energy Level
1,420.00 kJ/mol
99+
965.20 kJ/mol
99+
3rd Energy Level
1,900.00 kJ/mol
99+
3,600.00 kJ/mol
14
4th Energy Level
3,145.00 kJ/mol
99+
Not Available
Electrochemical Equivalent
1.48 g/amp-hr
99+
2.56 g/amp-hr
20
Electron Work Function
3.63 eV
30
2.70 eV
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
92
26
56
99+
Electron Configuration
[Rn] 5f3 6d1 7s2
[Xe] 6s2
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
56
99+
Number of Neutrons
146
13
81
99+
Number of Electrons
92
26
56
99+
Radius of an Atom
Atomic Radius
156.00 pm
29
222.00 pm
4
Covalent Radius
196.00 pm
14
215.00 pm
5
Van der Waals Radius
186.00 pm
33
268.00 pm
6
Atomic Weight
238.03 amu
21
137.33 amu
99+
Atomic Volume
12.59 cm3/mol
40
39.24 cm3/mol
5
Adjacent Atomic Numbers
Valence Electron Potential
170.00 (-eV)
4
21.30 (-eV)
99+
Lattice Constant
295.08 pm
99+
502.80 pm
15
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
3.51 g/cm3
99+
Density When Liquid (at m.p.)
17.30 g/cm3
7
3.34 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
7.11 (Pa)
6
Vapor Pressure at 2000 K
0.01 (Pa)
20
Not Available
Elasticity properties
Shear Modulus
111.00 GPa
10
4.90 GPa
99+
Bulk Modulus
100.00 GPa
16
9.60 GPa
99+
Young's Modulus
208.00 GPa
10
13.00 GPa
99+
Poisson Ratio
0.23
30
Not Available
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
18.80
10
3.62
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Superconductor
Resistivity
0.28 nΩ·m
99+
332.00 nΩ·m
13
Electrical Conductivity
0.04 106/cm Ω
37
0.03 106/cm Ω
40
Electron Affinity
Not Available
13.95 kJ/mol
36
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.20 J/(kg K)
30
Molar Heat Capacity
27.67 J/mol·K
15
28.07 J/mol·K
12
Thermal Conductivity
27.50 W/m·K
40
18.40 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
13.90 µm/(m·K)
27
20.60 µm/(m·K)
22
Enthalpy
Enthalpy of Vaporization
477.00 kJ/mol
13
140.00 kJ/mol
99+
Enthalpy of Fusion
15.48 kJ/mol
19
7.66 kJ/mol
99+
Enthalpy of Atomization
489.50 kJ/mol
14
175.70 kJ/mol
99+
Standard Molar Entropy
50.20 J/mol.K
31
62.50 J/mol.K
20
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