Symbol
Au
  
Bi
  
Period Number
6
  
6
  
Block
d block
  
p block
  
Element Family
Transition Metal
  
Post-Transition
  
Space Group Name
Fm_ 3m
  
C12/m1
  
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.
  
- Bismuth metal is soluble and reacts with concentrated nitric acid.
- It oxides are used as a yellow pigment in paint. Bismuth chloride oxide BiClO gives a pearly texture to cosmetics.
  
Sources
Earth's crust, Mining, Ores of metals
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Unknown
  
Claude François Geoffroy
  
Discovery
Before 6000 BCE
  
In 1753
  
Abundance
  
  
Abundance In Sun
~0.0000001 %
  
26
~0.000006 %
  
14
Abundance In Earth's Crust
Abundance In Humans
Not Available
  
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.
  
- Tin and bismuth alloys have a very low melting point and hence it is used in fire detector and the fire extinguishers. It also used in electric solders and fuses.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry
  
Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
  
Medical Uses
Dentistry, Pharmaceutical Industry
  
Pharmaceutical Industry
  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
  
Alloys
  
Biological Properties
  
  
Toxicity
Non Toxic
  
Low Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
35
0.02 Blood/mg dm-3
  
20
In Bone
0.02 p.p.m.
  
30
0.20 p.p.m.
  
22
Melting Point
1,064.43 °C
  
99+
Boiling Point
2,807.00 °C
  
36
1,560.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gold
  
Silver
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
194.00 MPa
  
99+
Vickers Hardness
Not Available
  
Speed of Sound
2,030.00 m/s
  
99+
1,790.00 m/s
  
99+
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Au
  
Bi
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol
  
8
703.00 kJ/mol
  
35
2nd Energy Level
1,980.00 kJ/mol
  
12
1,610.00 kJ/mol
  
33
3rd Energy Level
Not Available
  
2,466.00 kJ/mol
  
99+
4th Energy Level
Not Available
  
4,370.00 kJ/mol
  
28
5th Energy Level
Not Available
  
5,400.00 kJ/mol
  
30
6th Energy Level
Not Available
  
8,520.00 kJ/mol
  
19
Electrochemical Equivalent
2.45 g/amp-hr
  
21
2.60 g/amp-hr
  
19
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Ionization, Radioactive Isotopes, Solubility
  
Electron Configuration
[Xe] 4f14 5d10 6s1
  
[Xe] 4f14 5d10 6s2 6p3
  
Crystal Structure
Face Centered Cubic (FCC)
  
Rhombohedral (RHO)
  
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100
  
RHO-Crystal-Structure-of-Bismuth.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
10.20 cm3/mol
  
99+
21.30 cm3/mol
  
14
Adjacent Atomic Numbers
  
  
Valence Electron Potential
43.40 (-eV)
  
99+
41.90 (-eV)
  
99+
Lattice Angles
π/2, π/2, π/2
  
NA
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
19.30 g/cm3
  
15
Density When Liquid (at m.p.)
10.05 g/cm3
  
18
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
NA
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Diamagnetic
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Semiconductor
  
Electrical Conductivity
0.45 106/cm Ω
  
3
0.01 106/cm Ω
  
99+
Electron Affinity
222.80 kJ/mol
  
1
91.20 kJ/mol
  
11
Specific Heat
0.13 J/(kg K)
  
39
0.12 J/(kg K)
  
40
Molar Heat Capacity
25.42 J/mol·K
  
40
25.52 J/mol·K
  
37
Thermal Conductivity
318.00 W/m·K
  
3
7.97 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
14.20 µm/(m·K)
  
26
13.40 µm/(m·K)
  
28
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol
  
27
151.00 kJ/mol
  
99+
Enthalpy of Fusion
12.55 kJ/mol
  
27
10.90 kJ/mol
  
33
Enthalpy of Atomization
364.00 kJ/mol
  
25
207.10 kJ/mol
  
99+
Standard Molar Entropy
47.40 J/mol.K
  
32
56.70 J/mol.K
  
24