Uranium vs Francium
Periodic Table
Symbol
U
Fr
Group Number
0
18
1
17
Period Number
7
7
Block
f block
s block
Element Family
Actinide
Alkali
CAS Number
7440611
28
7440735
18
Space Group Name
Cmcm
Not Available
Space Group Number
63.00
10
Not Available
Facts
Interesting Facts
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
Sources
Earth's crust, Mining, Ores of Minerals
Formed by Decay Process, Mining
History
Who Discovered
Not Available
Marguerite Perey
Discovery
In 1789
In 1939
Abundance
Abundance In Universe
2 * 10-8 %
29
Not Available
Abundance In Sun
~0.0000001 %
26
~-9999 %
Abundance In Meteorites
0.00 %
99+
Not Available
Abundance In Earth's Crust
0.00 %
36
Not Available
Abundance In Oceans
0.00 %
11
Not Available
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.
- Francium has no known uses as it has a half life of only 22 minutes.
Industrial Uses
Ammunition Industry, Chemical Industry
NA
Medical Uses
NA
NA
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
NA
Biological Properties
Toxicity
Toxic
NA
Present in Human Body
No
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
Not Available
0.00 p.p.m.
36
Physical Properties
Melting Point
1,132.00 °C
39
27.00 °C
99+
Boiling Point
3,818.00 °C
16
677.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
NA
Luster
Metallic
NA
Hardness
Mohs Hardness
6.00
6
Not Available
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
Not Available
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
Fr
Isotopes
Known Isotopes
25
14
33
6
Electronegativity
Pauling Electronegativity
1.38
28
0.70
99+
Allred Rochow Electronegativity
1.22
26
0.86
99+
Mulliken-Jaffe Electronegativity
Not Available
0.68
25
Allen Electronegativity
Not Available
0.67
99+
Electropositivity
Pauling Electropositivity
2.62
26
3.30
1
Ionization Energies
1st Energy Level
597.60 kJ/mol
99+
380.00 kJ/mol
99+
2nd Energy Level
1,420.00 kJ/mol
99+
Not Available
3rd Energy Level
1,900.00 kJ/mol
99+
Not Available
4th Energy Level
3,145.00 kJ/mol
99+
Not Available
Electrochemical Equivalent
1.48 g/amp-hr
99+
8.32 g/amp-hr
1
Electron Work Function
3.63 eV
30
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
92
26
87
31
Electron Configuration
[Rn] 5f3 6d1 7s2
[Rn] 7s1
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
87
31
Number of Neutrons
146
13
136
17
Number of Electrons
92
26
87
31
Radius of an Atom
Atomic Radius
156.00 pm
29
Not Available
Covalent Radius
196.00 pm
14
260.00 pm
1
Van der Waals Radius
186.00 pm
33
348.00 pm
1
Atomic Weight
238.03 amu
21
223.00 amu
27
Atomic Volume
12.59 cm3/mol
40
Not Available
Adjacent Atomic Numbers
Valence Electron Potential
170.00 (-eV)
4
8.00 (-eV)
99+
Lattice Constant
295.08 pm
99+
Not Available
Lattice Angles
π/2, π/2, π/2
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
19.10 g/cm3
17
1.87 g/cm3
99+
Density When Liquid (at m.p.)
17.30 g/cm3
7
Not Available
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
Not Available
Young's Modulus
208.00 GPa
10
Not Available
Poisson Ratio
0.23
30
Not Available
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
18.80
10
Not Available
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Poor Conductor
Resistivity
0.28 nΩ·m
99+
3.00 nΩ·m
99+
Electrical Conductivity
0.04 106/cm Ω
37
0.03 106/cm Ω
40
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
Not Available
Molar Heat Capacity
27.67 J/mol·K
15
Not Available
Thermal Conductivity
27.50 W/m·K
40
15.00 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
13.90 µm/(m·K)
27
Not Available
Enthalpy
Enthalpy of Vaporization
477.00 kJ/mol
13
Not Available
Enthalpy of Fusion
15.48 kJ/mol
19
Not Available
Enthalpy of Atomization
489.50 kJ/mol
14
71.00 kJ/mol
99+
Standard Molar Entropy
50.20 J/mol.K
31
Not Available
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