Symbol
Au
  
Zr
  
Period Number
6
  
5
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
Space Group Name
Fm_ 3m
  
P63/mmc
  
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.
  
- Zirconium metal can resist to weak acids.
- Zirconium metal reacts with oxygen and nitrogen in the atmosphere.
  
Sources
Earth's crust, Mining, Ores of metals
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Unknown
  
Martin Heinrich Klaproth
  
Discovery
Before 6000 BCE
  
In 1789
  
Abundance
  
  
Abundance In Sun
~0.0000001 %
  
26
~0.000004 %
  
16
Abundance In Earth's Crust
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.
  
- As this metal does not absorb neutrons; It is used in nuclear power stations.
- Its oxide is used in ultra strong ceramics. It is also used in manufacturing Crucibles.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry
  
Aerospace Industry, Ammunition Industry
  
Medical Uses
Dentistry, Pharmaceutical Industry
  
NA
  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
  
Alloys, Nuclear Research, Research Purposes
  
Biological Properties
  
  
Toxicity
Non Toxic
  
NA
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
35
0.01 Blood/mg dm-3
  
21
In Bone
0.02 p.p.m.
  
30
0.10 p.p.m.
  
23
Melting Point
1,064.43 °C
  
99+
1,852.00 °C
  
15
Boiling Point
2,807.00 °C
  
36
4,377.00 °C
  
11
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gold
  
Silvery White
  
Luster
Metallic
  
Lustrous
  
Hardness
  
  
Brinell Hardness
194.00 MPa
  
99+
Speed of Sound
2,030.00 m/s
  
99+
3,800.00 m/s
  
20
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
  
Zr
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol
  
8
640.10 kJ/mol
  
99+
2nd Energy Level
1,980.00 kJ/mol
  
12
1,270.00 kJ/mol
  
99+
3rd Energy Level
Not Available
  
2,218.00 kJ/mol
  
99+
4th Energy Level
Not Available
  
3,313.00 kJ/mol
  
99+
5th Energy Level
Not Available
  
7,752.00 kJ/mol
  
10
6th Energy Level
Not Available
  
9,500.00 kJ/mol
  
15
Electrochemical Equivalent
2.45 g/amp-hr
  
21
0.85 g/amp-hr
  
99+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility
  
Electron Configuration
[Xe] 4f14 5d10 6s1
  
[Kr] 4d2 5s2
  
Crystal Structure
Face Centered Cubic (FCC)
  
Hexagonal Close Packed (HCP)
  
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100
  
HCP-Crystal-Structure-of-Zirconium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
10.20 cm3/mol
  
99+
14.10 cm3/mol
  
36
Adjacent Atomic Numbers
  
  
Valence Electron Potential
43.40 (-eV)
  
99+
80.00 (-eV)
  
18
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, 2 π/3
  
Density
  
  
Density At Room Temperature
19.30 g/cm3
  
15
6.52 g/cm3
  
99+
Density When Liquid (at m.p.)
5.80 g/cm3
  
99+
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
421.00 nΩ·m
  
11
Electrical Conductivity
0.45 106/cm Ω
  
3
0.02 106/cm Ω
  
99+
Electron Affinity
222.80 kJ/mol
  
1
41.10 kJ/mol
  
27
Specific Heat
0.13 J/(kg K)
  
39
0.27 J/(kg K)
  
19
Molar Heat Capacity
25.42 J/mol·K
  
40
25.36 J/mol·K
  
99+
Thermal Conductivity
318.00 W/m·K
  
3
22.60 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
14.20 µm/(m·K)
  
26
5.70 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol
  
27
581.60 kJ/mol
  
9
Enthalpy of Fusion
12.55 kJ/mol
  
27
20.90 kJ/mol
  
11
Enthalpy of Atomization
364.00 kJ/mol
  
25
598.00 kJ/mol
  
10
Standard Molar Entropy
47.40 J/mol.K
  
32
39.00 J/mol.K
  
39