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Gold vs Francium

Gold
Francium
Francium vs Gold


Periodic Table
Symbol
Au   
Fr   
Group Number
11   
7
1   
17
Period Number
6   
7   
Block
d block   
s block   
Element Family
Transition Metal   
Alkali   
CAS Number
7440575   
31
7440735   
18
Space Group Name
Fm_ 3m   
Not Available   
Space Group Number
225.00   
2
Not Available   
Facts
Interesting Facts
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
  • 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 metals   
Formed by Decay Process, Mining   
History
  
  
Who Discovered
Unknown   
Marguerite Perey   
Discovery
Before 6000 BCE   
In 1939   
Abundance
  
  
Abundance In Universe
6 * 10-8 %   
26
Not Available   
Abundance In Sun
~0.0000001 %   
26
~-9999 %   
Abundance In Meteorites
0.00 %   
99+
Not Available   
Abundance In Earth's Crust
0.00 %   
99+
Not Available   
Abundance In Oceans
0.00 %   
21
Not Available   
Abundance In Humans
0.00 %   
18
Not Available   
Uses
Uses & Benefits
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
  • Francium has no known uses as it has a half life of only 22 minutes.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry   
NA   
Medical Uses
Dentistry, Pharmaceutical Industry   
NA   
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
NA   
Biological Properties
  
  
Toxicity
Non Toxic   
NA   
Present in Human Body
Yes   
No   
In Blood
0.00 Blood/mg dm-3   
35
0.00 Blood/mg dm-3   
37
In Bone
0.02 p.p.m.   
30
0.00 p.p.m.   
36
Physical Properties
Melting Point
1,064.43 °C   
99+
27.00 °C   
99+
Boiling Point
2,807.00 °C   
36
677.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gold   
NA   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
2.50   
14
Not Available   
Brinell Hardness
194.00 MPa   
99+
Not Available   
Vickers Hardness
216.00 MPa   
31
Not Available   
Speed of Sound
2,030.00 m/s   
99+
Not Available   
Optical Properties
  
  
Reflectivity
95.00 %   
2
Not Available   
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
Au   
Fr   
Isotopes
  
  
Known Isotopes
36   
3
33   
6
Electronegativity
  
  
Pauling Electronegativity
2.54   
1
0.70   
99+
Allred Rochow Electronegativity
1.42   
18
0.86   
99+
Mulliken-Jaffe Electronegativity
1.87   
7
0.68   
25
Allen Electronegativity
1.92   
5
0.67   
99+
Electropositivity
  
  
Pauling Electropositivity
1.46   
99+
3.30   
1
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol   
8
380.00 kJ/mol   
99+
2nd Energy Level
1,980.00 kJ/mol   
12
Not Available   
Electrochemical Equivalent
2.45 g/amp-hr   
21
8.32 g/amp-hr   
1
Electron Work Function
5.10 eV   
4
Not Available   
Other Chemical Properties
Chemical Stability, Ionization, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
79   
37
87   
31
Electron Configuration
[Xe] 4f14 5d10 6s1   
[Rn] 7s1   
Crystal Structure
Face Centered Cubic (FCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
79   
37
87   
31
Number of Neutrons
118   
23
136   
17
Number of Electrons
79   
37
87   
31
Radius of an Atom
  
  
Atomic Radius
151.00 pm   
32
Not Available   
Covalent Radius
144.00 pm   
40
260.00 pm   
1
Van der Waals Radius
166.00 pm   
39
348.00 pm   
1
Atomic Weight
196.97 amu   
33
223.00 amu   
27
Atomic Volume
10.20 cm3/mol   
99+
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Platinum
  
Polonium
  
Next Element
Mercury
  
Radium
  
Valence Electron Potential
43.40 (-eV)   
99+
8.00 (-eV)   
99+
Lattice Constant
407.82 pm   
21
Not Available   
Lattice Angles
π/2, π/2, π/2   
NA   
Lattice C/A Ratio
1.61   
4
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
19.30 g/cm3   
15
1.87 g/cm3   
99+
Density When Liquid (at m.p.)
17.31 g/cm3   
6
Not Available   
Tensile Strength
120.00 MPa   
15
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
23
Not Available   
Vapor Pressure at 2000 K
67.00 (Pa)   
4
Not Available   
Elasticity properties
  
  
Shear Modulus
27.00 GPa   
27
Not Available   
Bulk Modulus
180.00 GPa   
9
Not Available   
Young's Modulus
79.00 GPa   
24
Not Available   
Poisson Ratio
0.40   
4
Not Available   
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
19.32   
8
Not Available   
Magnetic Ordering
Diamagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Poor Conductor   
Resistivity
2.20 nΩ·m   
99+
3.00 nΩ·m   
99+
Electrical Conductivity
0.45 106/cm Ω   
3
0.03 106/cm Ω   
40
Electron Affinity
222.80 kJ/mol   
1
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
Not Available   
Molar Heat Capacity
25.42 J/mol·K   
40
Not Available   
Thermal Conductivity
318.00 W/m·K   
3
15.00 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
14.20 µm/(m·K)   
26
Not Available   
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol   
27
Not Available   
Enthalpy of Fusion
12.55 kJ/mol   
27
Not Available   
Enthalpy of Atomization
364.00 kJ/mol   
25
71.00 kJ/mol   
99+
Standard Molar Entropy
47.40 J/mol.K   
32
Not Available   
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