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Potassium Silver Comparison

Potassium
Silver
Silver Potassium comparison


Periodic Table
Symbol
K  
Ag  
Group Number
1  
17
11  
7
Period Number
4  
5  
Block
s block  
d block  
Element Family
Alkali  
Transition Metal  
CAS Number
7440097  
99+
7440224  
99+
Space Group Name
Im_ 3m  
Fm_ 3m  
Space Group Number
229.00  
2
225.00  
3
Facts
Interesting Facts
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  
  • 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.
  
Sources
Found in Minerals, Mining  
Earth's crust, Found in Minerals, Ores of metals  
History
  
  
Who Discovered
Humphry Davy  
-  
Discovery
In 1807  
Before 5000 BC  
Abundance
  
  
Abundance In Universe
0.00 %  
10
0.00 %  
27
Abundance In Sun
0.00 %  
9
0.00 %  
26
Abundance In Meteorites
0.07 %  
9
0.00 %  
38
Abundance In Earth's Crust
1.50 %  
6
0.00 %  
99+
Abundance In Oceans
0.04 %  
3
0.00 %  
19
Abundance In Humans
0.20 %  
3
0.00 %  
24
Uses
Uses & Benefits
  • Potassium’s compounds are in high demand for their application in Fertilizer manufacturing.
  • Potassium carbonate is used in glass manufacturing and Potassium carbonate in manufacturing detergent and body wash.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
Chemical Industry, Clothing Industry, Electrical Industry  
Medical Uses
Pharmaceutical Industry  
Dentistry, Pharmaceutical Industry  
Other Uses
-  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
1,620.00 Blood/mg dm-3  
2
0.00 Blood/mg dm-3  
29
In Bone
2,100.00 p.p.m.  
3
0.44 p.p.m.  
24
Physical
Melting Point
63.65 °C  
99+
961.93 °C  
99+
Boiling Point
774.00 °C  
99+
2,212.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gray  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
0.40  
25
2.50  
15
Brinell Hardness
0.36 MPa  
99+
251.00 MPa  
99+
Vickers Hardness
100.00 MPa  
99+
229.00 MPa  
99+
Speed of Sound
2,000.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.33  
99+
0.16  
99+
Reflectivity
72.00 %  
11
97.00 %  
1
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
K  
Ag  
Isotopes
  
  
Known Isotopes
20  
19
36  
3
Electronegativity
  
  
Pauling Electronegativity
0.82  
99+
1.93  
10
Sanderson Electronegativity
0.45  
99+
1.83  
14
Allred Rochow Electronegativity
0.91  
40
1.42  
19
Mulliken-Jaffe Electronegativity
0.73  
99+
1.47  
28
Allen Electronegativity
0.73  
99+
1.87  
10
Electropositivity
  
  
Pauling Electropositivity
3.18  
3
2.07  
99+
Ionization Energies
  
  
1st Energy Level
418.80 kJ/mol  
99+
731.00 kJ/mol  
27
2nd Energy Level
3,052.00 kJ/mol  
5
2,070.00 kJ/mol  
11
3rd Energy Level
4,420.00 kJ/mol  
8
3,361.00 kJ/mol  
19
4th Energy Level
5,877.00 kJ/mol  
18
7,310.00 kJ/mol  
10
5th Energy Level
7,975.00 kJ/mol  
14
7,310.00 kJ/mol  
24
6th Energy Level
9,590.00 kJ/mol  
19
7,310.00 kJ/mol  
39
7th Energy level
11,343.00 kJ/mol  
17
7,310.00 kJ/mol  
33
8th Energy Level
14,944.00 kJ/mol  
13
7,310.00 kJ/mol  
31
9th Energy Level
16,963.70 kJ/mol  
15
7,310.00 kJ/mol  
27
10th Energy Level
48,610.00 kJ/mol  
3
7,310.00 kJ/mol  
32
11th Energy Level
54,490.00 kJ/mol  
4
7,310.00 kJ/mol  
31
12th Energy Level
60,730.00 kJ/mol  
15
7,310.00 kJ/mol  
99+
13th Energy Level
68,950.00 kJ/mol  
4
7,310.00 kJ/mol  
25
14th Energy Level
75,900.00 kJ/mol  
5
731.00 kJ/mol  
99+
15th Energy Level
83,080.00 kJ/mol  
13
73,100.00 kJ/mol  
22
16th Energy Level
93,400.00 kJ/mol  
7
73,100.00 kJ/mol  
17
17th Energy Level
99,710.00 kJ/mol  
8
731.00 kJ/mol  
38
18th Energy Level
4,196.00 kJ/mol  
99+
7,310.00 kJ/mol  
28
19th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
35
20th Energy Level
419.00 kJ/mol  
99+
731.00 kJ/mol  
29
21st Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
99+
22nd Energy Level
419.00 kJ/mol  
99+
731.00 kJ/mol  
23
23rd Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
99+
24th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
22
25th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
22
26th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
22
27th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
21
28th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
27
29th Energy Level
419.20 kJ/mol  
99+
731.00 kJ/mol  
28
30th Energy Level
419.00 kJ/mol  
99+
731.00 kJ/mol  
22
Electrochemical Equivalent
1.46 g/amp-hr  
99+
4.02 g/amp-hr  
7
Electron Work Function
2.30 eV  
99+
4.26 eV  
27
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
19  
99+
47  
99+
Electron Configuration
[Ar] 4s1  
[Kr] 4d10 5s1  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Silver.jpg#100  
Atom
  
  
Number of Protons
19  
99+
47  
99+
Number of Neutrons
20  
99+
61  
99+
Number of Electrons
19  
99+
47  
99+
Radius of an Atom
  
  
Atomic Radius
227.00 pm  
4
144.00 pm  
38
Covalent Radius
203.00 pm  
9
145.00 pm  
99+
Van der Waals Radius
275.00 pm  
7
172.00 pm  
99+
Atomic Weight
39.10 amu  
99+
107.87 amu  
99+
Atomic Volume
45.46 cm3/mol  
4
10.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Aluminium
  
Palladium
  
Next Element
Calcium
  
Cadmium
  
Valence Electron Potential
10.40 (-eV)  
99+
11.40 (-eV)  
99+
Lattice Constant
532.80 pm  
13
408.53 pm  
23
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.69  
10
1.59  
26
Mechanical
Density
  
  
Density At Room Temperature
0.86 g/cm3  
99+
10.49 g/cm3  
37
Density When Liquid (at m.p.)
0.83 g/cm3  
99+
9.32 g/cm3  
99+
Tensile Strength
16.00 MPa  
99+
170.00 MPa  
21
Viscosity
0.00  
9
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
14
Vapor Pressure at 2000 K
0.00 (Pa)  
34
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
1.30 GPa  
99+
30.00 GPa  
27
Bulk Modulus
3.10 GPa  
99+
100.00 GPa  
16
Young's Modulus
3.53 GPa  
99+
83.00 GPa  
25
Poisson Ratio
0.35  
9
0.37  
7
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
0.86  
99+
10.50  
39
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
17
Susceptibility
0.00  
23
0.00  
32
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
72.00 nΩ·m  
37
15.87 nΩ·m  
99+
Electrical Conductivity
0.14 106/cm Ω  
16
0.63 106/cm Ω  
1
Electron Affinity
48.40 kJ/mol  
27
125.60 kJ/mol  
5
Thermal
Specific Heat
0.75 J/(kg K)  
6
0.24 J/(kg K)  
25
Molar Heat Capacity
29.60 J/mol·K  
8
25.35 J/mol·K  
99+
Thermal Conductivity
102.50 W/m·K  
15
429.00 W/m·K  
1
Critical Temperature
2,223.00 K  
14
1,235.00 K  
99+
Thermal Expansion
83.30 µm/(m·K)  
3
18.90 µm/(m·K)  
25
Enthalpy
  
  
Enthalpy of Vaporization
77.50 kJ/mol  
99+
255.10 kJ/mol  
99+
Enthalpy of Fusion
2.32 kJ/mol  
99+
11.30 kJ/mol  
37
Enthalpy of Atomization
89.50 kJ/mol  
99+
284.50 kJ/mol  
99+
Standard Molar Entropy
64.70 J/mol.K  
19
42.60 J/mol.K  
99+
Summary >>
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