Symbol
Ni
  
Au
  
Period Number
4
  
6
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
Space Group Name
Fm_ 3m
  
Fm_ 3m
  
Interesting Facts
- Zinc metal found (obtain) in many forms like granules, foil, dust and in a powder form.
- After iron, Zinc metal the second most abundant element in the earth crust.
  
- 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.
  
Sources
Found in Minerals, Mining, Ores of Minerals
  
Earth's crust, Mining, Ores of metals
  
History
  
  
Who Discovered
Axel Fredrik Cronstedt
  
Unknown
  
Discovery
In 1751
  
Before 6000 BCE
  
Abundance
  
  
Abundance In Sun
~0.0000001 %
  
26
Abundance In Earth's Crust
Uses & Benefits
- It has corrosion resistance and hence it is used to plate other metals.
- Its alloys are very useful; Nichrome alloy is used in the hot coil of toasters and electric oven.
  
- 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.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
Dentistry, Pharmaceutical Industry
  
Other Uses
Alloys
  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
  
Biological Properties
  
  
Toxicity
Toxic
  
Non Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.05 Blood/mg dm-3
  
17
0.00 Blood/mg dm-3
  
35
In Bone
0.70 p.p.m.
  
18
0.02 p.p.m.
  
30
Melting Point
1,453.00 °C
  
31
1,064.43 °C
  
99+
Boiling Point
2,732.00 °C
  
38
2,807.00 °C
  
36
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silver
  
Gold
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
194.00 MPa
  
99+
Speed of Sound
4,900.00 m/s
  
12
2,030.00 m/s
  
99+
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Ni
  
Au
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
737.10 kJ/mol
  
25
890.10 kJ/mol
  
8
2nd Energy Level
1,753.00 kJ/mol
  
25
1,980.00 kJ/mol
  
12
3rd Energy Level
3,395.00 kJ/mol
  
17
Not Available
  
4th Energy Level
5,300.00 kJ/mol
  
15
Not Available
  
5th Energy Level
7,339.00 kJ/mol
  
15
Not Available
  
6th Energy Level
10,400.00 kJ/mol
  
9
Not Available
  
7th Energy level
12,800.00 kJ/mol
  
10
Not Available
  
8th Energy Level
15,600.00 kJ/mol
  
10
Not Available
  
9th Energy Level
18,600.00 kJ/mol
  
10
Not Available
  
10th Energy Level
21,670.00 kJ/mol
  
14
Not Available
  
11th Energy Level
30,970.00 kJ/mol
  
7
Not Available
  
12th Energy Level
34,000.00 kJ/mol
  
7
Not Available
  
13th Energy Level
37,100.00 kJ/mol
  
7
Not Available
  
14th Energy Level
41,500.00 kJ/mol
  
8
Not Available
  
15th Energy Level
44,800.00 kJ/mol
  
10
Not Available
  
16th Energy Level
48,100.00 kJ/mol
  
12
Not Available
  
17th Energy Level
55,101.00 kJ/mol
  
11
Not Available
  
18th Energy Level
58,570.00 kJ/mol
  
12
Not Available
  
19th Energy Level
148,700.00 kJ/mol
  
1
Not Available
  
20th Energy Level
159,000.00 kJ/mol
  
3
Not Available
  
21st Energy Level
169,400.00 kJ/mol
  
3
Not Available
  
22nd Energy Level
182,700.00 kJ/mol
  
2
Not Available
  
23rd Energy Level
194,000.00 kJ/mol
  
2
Not Available
  
Electrochemical Equivalent
1.10 g/amp-hr
  
99+
2.45 g/amp-hr
  
21
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes
  
Chemical Stability, Ionization, Solubility
  
Electron Configuration
[Ar] 3d8 4s2 Or [Ar] 3d9 4s1
  
[Xe] 4f14 5d10 6s1
  
Crystal Structure
Face Centered Cubic (FCC)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
FCC-Crystal-Structure-of-Nickel.jpg#100
  
FCC-Crystal-Structure-of-Gold.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
6.59 cm3/mol
  
99+
10.20 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
42.00 (-eV)
  
99+
43.40 (-eV)
  
99+
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
8.91 g/cm3
  
99+
19.30 g/cm3
  
15
Density When Liquid (at m.p.)
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Ferromagnetic
  
Diamagnetic
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Electrical Conductivity
0.14 106/cm Ω
  
13
0.45 106/cm Ω
  
3
Electron Affinity
112.00 kJ/mol
  
6
222.80 kJ/mol
  
1
Specific Heat
0.44 J/(kg K)
  
13
0.13 J/(kg K)
  
39
Molar Heat Capacity
26.07 J/mol·K
  
31
25.42 J/mol·K
  
40
Thermal Conductivity
90.90 W/m·K
  
18
318.00 W/m·K
  
3
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
13.40 µm/(m·K)
  
28
14.20 µm/(m·K)
  
26
Enthalpy
  
  
Enthalpy of Vaporization
371.80 kJ/mol
  
20
324.40 kJ/mol
  
27
Enthalpy of Fusion
17.57 kJ/mol
  
14
12.55 kJ/mol
  
27
Enthalpy of Atomization
422.60 kJ/mol
  
17
364.00 kJ/mol
  
25
Standard Molar Entropy
29.90 J/mol.K
  
99+
47.40 J/mol.K
  
32