Symbol
Ag
  
Na
  
Period Number
5
  
3
  
Block
d block
  
s block
  
Element Family
Transition Metal
  
Alkali
  
Space Group Name
Fm_ 3m
  
Im_ 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.
  
- At room temperature Sodium metal is very soft as it can be chopped down into pieces with butter knife.
- The most common compound of Sodium is NaCl (Salt).
  
Sources
Earth's crust, Found in Minerals, Ores of metals
  
By Electrolysis Process, Mining
  
History
  
  
Who Discovered
Unknown
  
Humphry Davy
  
Discovery
Before 5000 BC
  
In 1807
  
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.
  
- In some nuclear reactors sodium is used as a heat exchanger.
- Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical 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
  
Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
29
1,970.00 Blood/mg dm-3
  
1
In Bone
0.44 p.p.m.
  
20
10,000.00 p.p.m.
  
2
Boiling Point
2,212.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery White
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Vickers Hardness
Not Available
  
Speed of Sound
2,680.00 m/s
  
34
3,200.00 m/s
  
24
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
Ag
  
Na
  
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
495.80 kJ/mol
  
99+
2nd Energy Level
2,070.00 kJ/mol
  
11
4,562.00 kJ/mol
  
4
3rd Energy Level
3,361.00 kJ/mol
  
19
6,910.30 kJ/mol
  
6
4th Energy Level
Not Available
  
9,543.00 kJ/mol
  
5
5th Energy Level
Not Available
  
13,354.00 kJ/mol
  
4
6th Energy Level
Not Available
  
16,613.00 kJ/mol
  
4
7th Energy level
Not Available
  
20,117.00 kJ/mol
  
4
8th Energy Level
Not Available
  
25,496.00 kJ/mol
  
4
9th Energy Level
Not Available
  
28,932.00 kJ/mol
  
4
10th Energy Level
Not Available
  
141,362.00 kJ/mol
  
2
11th Energy Level
Not Available
  
159,076.00 kJ/mol
  
2
Electrochemical Equivalent
4.02 g/amp-hr
  
7
0.86 g/amp-hr
  
99+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Chemical Stability, Corrosion, Flammability, Ionization, Solubility
  
Electron Configuration
[Kr] 4d10 5s1
  
[Ne] 3s1
  
Crystal Structure
Face Centered Cubic (FCC)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Weight
107.87 amu
  
99+
Atomic Volume
10.30 cm3/mol
  
99+
23.70 cm3/mol
  
10
Adjacent Atomic Numbers
  
  
Valence Electron Potential
11.40 (-eV)
  
99+
14.10 (-eV)
  
99+
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
0.97 g/cm3
  
99+
Density When Liquid (at m.p.)
0.93 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Ductile, Malleable
  
NA
  
Magnetic Characteristics
  
  
Magnetic Ordering
Diamagnetic
  
Paramagnetic
  
Susceptibility
Not Available
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
15.87 nΩ·m
  
99+
47.70 nΩ·m
  
99+
Electrical Conductivity
0.63 106/cm Ω
  
1
0.21 106/cm Ω
  
9
Electron Affinity
125.60 kJ/mol
  
5
52.80 kJ/mol
  
19
Specific Heat
0.24 J/(kg K)
  
25
1.23 J/(kg K)
  
3
Molar Heat Capacity
25.35 J/mol·K
  
99+
28.23 J/mol·K
  
10
Thermal Conductivity
429.00 W/m·K
  
1
142.00 W/m·K
  
11
Critical Temperature
Not Available
  
Thermal Expansion
18.90 µm/(m·K)
  
23
71.00 µm/(m·K)
  
4
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol
  
37
89.04 kJ/mol
  
99+
Enthalpy of Fusion
11.30 kJ/mol
  
31
2.59 kJ/mol
  
99+
Enthalpy of Atomization
284.50 kJ/mol
  
37
108.40 kJ/mol
  
99+
Standard Molar Entropy
42.60 J/mol.K
  
35
51.30 J/mol.K
  
28