Symbol
Ag
  
Al
  
Period Number
5
  
3
  
Block
d block
  
p block
  
Element Family
Transition Metal
  
Post-Transition
  
Space Group Name
Fm_ 3m
  
Fm_ 3m
  
Interesting Facts
- It is the most reflective element.
- Silver is the second most ductile metal after Gold.
- It is also used in Dentistry as a dental alloys for clips and crowning.
  
- Aluminum’s abundance percentage is more as it is found in more than 260 minerals.
- Pure Aluminum always reacts with oxygen rapidly.
- It is a good conductor of heat and electricity and used in transmission lines.
  
Sources
Earth's crust, Found in Minerals, Ores of metals
  
By Electrolysis Process, Earth's crust, Mining
  
History
  
  
Who Discovered
Unknown
  
Hans Christian Oersted
  
Discovery
Before 5000 BC
  
In 1825
  
Abundance
  
  
Abundance In Sun
~0.0000001 %
  
26
Abundance In Earth's Crust
Abundance In Humans
Not Available
  
Uses & Benefits
- Silver is mainly used for Jewelry and show piece.
- It is used for manufacturing high quality mirrors due to its reflectivity property.
  
- Aluminum is used in a various products; for example, cans, foils, kitchen utensils, window frames, beer kegs and aero plane parts, automobile parts, etc.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry
  
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
  
Medical Uses
Dentistry, Pharmaceutical Industry
  
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
  
Alloys, Jewellery, Sculptures, Statues
  
Biological Properties
  
  
Toxicity
Non Toxic
  
Non Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
29
0.39 Blood/mg dm-3
  
9
In Bone
0.44 p.p.m.
  
20
27.00 p.p.m.
  
11
Boiling Point
2,212.00 °C
  
99+
2,467.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery Gray
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
160.00 MPa
  
99+
Speed of Sound
2,680.00 m/s
  
34
5,000.00 m/s
  
10
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
Ag
  
Al
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
731.00 kJ/mol
  
27
577.50 kJ/mol
  
99+
2nd Energy Level
2,070.00 kJ/mol
  
11
1,816.70 kJ/mol
  
19
3rd Energy Level
3,361.00 kJ/mol
  
19
2,744.80 kJ/mol
  
38
4th Energy Level
Not Available
  
11,577.00 kJ/mol
  
3
5th Energy Level
Not Available
  
14,842.00 kJ/mol
  
2
6th Energy Level
Not Available
  
18,379.00 kJ/mol
  
2
7th Energy level
Not Available
  
23,326.00 kJ/mol
  
2
8th Energy Level
Not Available
  
27,465.00 kJ/mol
  
2
9th Energy Level
Not Available
  
31,853.00 kJ/mol
  
2
10th Energy Level
Not Available
  
38,473.00 kJ/mol
  
4
11th Energy Level
Not Available
  
42,647.00 kJ/mol
  
5
Electrochemical Equivalent
4.02 g/amp-hr
  
7
0.34 g/amp-hr
  
99+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Chemical Stability, Ionization, Radioactive Isotopes
  
Electron Configuration
[Kr] 4d10 5s1
  
[Ne] 3s2 3p1
  
Crystal Structure
Face Centered Cubic (FCC)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100
  
FCC-Crystal-Structure-of-Aluminium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Weight
107.87 amu
  
99+
Atomic Volume
10.30 cm3/mol
  
99+
10.00 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
11.40 (-eV)
  
99+
80.70 (-eV)
  
17
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
10.49 g/cm3
  
35
2.70 g/cm3
  
99+
Density When Liquid (at m.p.)
2.38 g/cm3
  
99+
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Paramagnetic
  
Permeability
Not Available
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
15.87 nΩ·m
  
99+
28.20 nΩ·m
  
99+
Electrical Conductivity
0.63 106/cm Ω
  
1
0.38 106/cm Ω
  
4
Electron Affinity
125.60 kJ/mol
  
5
42.50 kJ/mol
  
26
Specific Heat
0.24 J/(kg K)
  
25
0.90 J/(kg K)
  
5
Molar Heat Capacity
25.35 J/mol·K
  
99+
24.20 J/mol·K
  
99+
Thermal Conductivity
429.00 W/m·K
  
1
237.00 W/m·K
  
4
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
18.90 µm/(m·K)
  
23
23.10 µm/(m·K)
  
17
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol
  
37
293.70 kJ/mol
  
31
Enthalpy of Fusion
11.30 kJ/mol
  
31
10.67 kJ/mol
  
35
Enthalpy of Atomization
284.50 kJ/mol
  
37
322.20 kJ/mol
  
31
Standard Molar Entropy
42.60 J/mol.K
  
35
28.30 J/mol.K
  
99+