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Francium Cadmium Comparison

Francium
Cadmium
Cadmium Francium comparison


Periodic Table
Symbol
Fr   
Cd   
Group Number
1   
17
12   
6
Period Number
7   
5   
Block
s block   
d block   
Element Family
Alkali   
Transition Metal   
CAS Number
7440735   
18
7440439   
99+
Space Group Name
Not Available   
P63/mmc   
Space Group Number
Not Available   
194.00   
5
Facts
Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
  • Naturally occurring minor elements include Cadmium.
  • Cadmium is released into atmosphere to control volcanic eruption and forest fires.
  • It is used for electroplating of Steel for corrosion resistance.
  • It can absorb neutrons and used in nuclear reactor to control atomic fission.
  
Sources
Formed by Decay Process, Mining   
Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Marguerite Perey   
Karl Samuel Leberecht Hermann and Friedrich Stromeyer   
Discovery
In 1939   
In 1817   
Abundance
  
  
Abundance In Universe
Not Available   
2 * 10-7 %   
22
Abundance In Sun
~-9999 %   
~0.0000006 %   
21
Abundance In Meteorites
Not Available   
0.00 %   
31
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
28
Abundance In Humans
Not Available   
0.00 %   
11
Uses
Uses & Benefits
  • Francium has no known uses as it has a half life of only 22 minutes.
  
  • It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
  • Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
  
Industrial Uses
NA   
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
NA   
Alloys   
Biological Properties
  
  
Toxicity
NA   
Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.01 Blood/mg dm-3   
24
In Bone
0.00 p.p.m.   
36
1.80 p.p.m.   
15
Physical Properties
Melting Point
27.00 °C   
99+
320.90 °C   
99+
Boiling Point
677.00 °C   
99+
765.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
NA   
Silvery Bluish-Gray   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.00   
16
Brinell Hardness
Not Available   
203.00 MPa   
39
Speed of Sound
Not Available   
2,310.00 m/s   
39
Optical Properties
  
  
Reflectivity
Not Available   
67.00 %   
11
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
Fr   
Cd   
Isotopes
  
  
Known Isotopes
33   
6
34   
5
Electronegativity
  
  
Pauling Electronegativity
0.70   
99+
1.69   
17
Sanderson Electronegativity
Not Available   
1.98   
9
Allred Rochow Electronegativity
0.86   
99+
1.46   
15
Mulliken-Jaffe Electronegativity
0.68   
25
1.53   
13
Allen Electronegativity
0.67   
99+
1.52   
27
Electropositivity
  
  
Pauling Electropositivity
3.30   
1
2.31   
37
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol   
99+
867.80 kJ/mol   
11
2nd Energy Level
Not Available   
1,631.40 kJ/mol   
32
3rd Energy Level
Not Available   
3,616.00 kJ/mol   
13
Electrochemical Equivalent
8.32 g/amp-hr   
1
2.10 g/amp-hr   
27
Electron Work Function
Not Available   
4.22 eV   
22
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
87   
31
48   
99+
Electron Configuration
[Rn] 7s1   
[Kr] 4d10 5s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Cadmium.jpg#100   
Atom
  
  
Number of Protons
87   
31
48   
99+
Number of Neutrons
136   
17
64   
99+
Number of Electrons
87   
31
48   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
151.00 pm   
32
Covalent Radius
260.00 pm   
1
144.00 pm   
40
Van der Waals Radius
348.00 pm   
1
158.00 pm   
99+
Atomic Weight
223.00 amu   
27
112.41 amu   
99+
Atomic Volume
Not Available   
13.10 cm3/mol   
39
Adjacent Atomic Numbers
  
  
Previous Element
Polonium
  
Silver
  
Next Element
Radium
  
Indium
  
Valence Electron Potential
8.00 (-eV)   
99+
30.00 (-eV)   
99+
Lattice Constant
Not Available   
297.94 pm   
99+
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.89   
1
Mechanical Properties
Density
  
  
Density At Room Temperature
1.87 g/cm3   
99+
8.65 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
8.00 g/cm3   
28
Tensile Strength
Not Available   
62.00 MPa   
16
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available   
19.00 GPa   
35
Bulk Modulus
Not Available   
42.00 GPa   
29
Young's Modulus
Not Available   
50.00 GPa   
36
Poisson Ratio
Not Available   
0.30   
14
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
8.65   
36
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Poor Conductor   
Semiconductor   
Resistivity
3.00 nΩ·m   
99+
72.70 nΩ·m   
36
Electrical Conductivity
0.03 106/cm Ω   
40
0.14 106/cm Ω   
15
Electron Affinity
Not Available   
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
Not Available   
0.23 J/(kg K)   
26
Molar Heat Capacity
Not Available   
26.02 J/mol·K   
32
Thermal Conductivity
15.00 W/m·K   
99+
96.60 W/m·K   
16
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
30.80 µm/(m·K)   
10
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
100.00 kJ/mol   
99+
Enthalpy of Fusion
Not Available   
6.19 kJ/mol   
99+
Enthalpy of Atomization
71.00 kJ/mol   
99+
113.00 kJ/mol   
99+
Standard Molar Entropy
Not Available   
51.80 J/mol.K   
27
Summary >>
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