1 Periodic Table
1.1 Symbol
1.2 Group Number
1.5 Period Number
2.5 Block
2.6 Element Family
2.7 CAS Number
74403267440097
7429905
54386242
2.8 Space Group Name
2.9 Space Group Number
3 Facts
3.1 Interesting Facts
- The only metal which burns in Nitrogen is Titanium.
- Titanium is also known as corrosion resistant metal.
- In the list of most abundant element Potassium is ranked 7th.
- Potassium can easily be sliced (chopped) down using knife.
3.2 Sources
Found in Minerals, Mining
Found in Minerals, Mining
3.3 History
3.3.1 Who Discovered
W. Gregor & J. Berzelius
Humphry Davy
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
3 * 10-4 %3 * 10-4 %
5E-09
0.11
3.4.3 Abundance In Sun
~0.0004 %~0.0004 %
1E-08
0.1
3.4.4 Abundance In Meteorites
3.4.6 Abundance In Earth's Crust
4.2.3 Abundance In Oceans
4.2.5 Abundance In Humans
5 Uses
5.1 Uses & Benefits
- Its alloys are used in spacecraft, aircraft and ammunition industry.
- Its pipes are used in distillation plants, submarines, hulls of big ships, etc.
- 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.
5.1.1 Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Ammunition Industry, Chemical Industry
5.1.2 Medical Uses
Dentistry, Surgical Instruments Manufacturing
Pharmaceutical Industry
5.1.3 Other Uses
Alloys, Jewellery, Sculptures, Statues
NA
5.2 Biological Properties
5.2.1 Toxicity
5.2.2 Present in Human Body
5.2.3 In Blood
0.05 Blood/mg dm-31,620.00 Blood/mg dm-3
0
1970
6.1.1 In Bone
NA2,100.00 p.p.m.
0
170000
7 Physical
7.1 Melting Point
1,660.00 °C63.65 °C
27
3410
7.4 Boiling Point
3,287.00 °C774.00 °C
147
5660
7.5 Appearance
7.5.1 Physical State
7.5.2 Color
Silvery Gray-White
Silvery Gray
7.5.3 Luster
7.6 Hardness
7.6.1 Mohs Hardness
7.6.2 Brinell Hardness
716.00 MPa0.36 MPa
0.14
3490
7.6.4 Vickers Hardness
7.8 Speed of Sound
5,090.00 m/s2,000.00 m/s
818
16200
7.10 Optical Properties
7.10.1 Refractive Index
7.10.2 Reflectivity
8.3 Allotropes
8.3.1 α Allotropes
Not Available
Not Available
8.3.2 β Allotropes
Not Available
Not Available
8.3.3 γ Allotropes
Not Available
Not Available
9 Chemical
9.1 Chemical Formula
9.2 Isotopes
9.2.1 Known Isotopes
9.4 Electronegativity
9.4.1 Pauling Electronegativity
9.4.3 Sanderson Electronegativity
9.4.4 Allred Rochow Electronegativity
9.4.6 Mulliken-Jaffe Electronegativity
9.4.8 Allen Electronegativity
9.5 Electropositivity
9.5.1 Pauling Electropositivity
9.7 Ionization Energies
9.7.1 1st Energy Level
658.80 kJ/mol418.80 kJ/mol
375.7
26130
9.8.2 2nd Energy Level
1,309.80 kJ/mol3,052.00 kJ/mol
710.2162
28750
9.8.4 3rd Energy Level
2,652.50 kJ/mol4,420.00 kJ/mol
1600
34230
9.8.6 4th Energy Level
4,174.60 kJ/mol5,877.00 kJ/mol
2780
37066
9.8.8 5th Energy Level
9,581.00 kJ/mol7,975.00 kJ/mol
4305.2
97510
9.8.10 6th Energy Level
11,533.00 kJ/mol9,590.00 kJ/mol
5715.8
105800
9.8.12 7th Energy level
13,590.00 kJ/mol11,343.00 kJ/mol
7226.8
114300
9.8.14 8th Energy Level
16,440.00 kJ/mol14,944.00 kJ/mol
8857.4
125300
9.8.16 9th Energy Level
18,530.00 kJ/mol16,963.70 kJ/mol
14110
134700
9.8.17 10th Energy Level
20,833.00 kJ/mol48,610.00 kJ/mol
17100
144300
9.8.20 11th Energy Level
25,575.00 kJ/mol54,490.00 kJ/mol
19900
169988
9.8.21 12th Energy Level
28,125.00 kJ/mol60,730.00 kJ/mol
22219
189368
9.8.23 13th Energy Level
76,015.00 kJ/mol68,950.00 kJ/mol
26930
76015
9.8.25 14th Energy Level
83,280.00 kJ/mol75,900.00 kJ/mol
29196
86450
9.8.27 15th Energy Level
90,880.00 kJ/mol83,080.00 kJ/mol
41987
97510
9.8.29 16th Energy Level
100,700.00 kJ/mol93,400.00 kJ/mol
47206
109480
9.8.30 17th Energy Level
109,100.00 kJ/mol99,710.00 kJ/mol
52737
122200
9.8.32 18th Energy Level
117,800.00 kJ/molNA
58570
134810
9.8.34 19th Energy Level
129,900.00 kJ/molNA
64702
148700
9.8.36 20th Energy Level
137,530.00 kJ/molNA
80400
171200
9.8.38 21st Energy Level
9.8.39 22nd Energy Level
9.8.41 23rd Energy Level
9.8.43 24th Energy Level
9.8.45 25th Energy Level
9.8.46 26th Energy Level
9.8.48 27th Energy Level
9.8.50 28th Energy Level
9.8.52 29th Energy Level
9.8.54 30th Energy Level
9.9 Electrochemical Equivalent
0.45 g/amp-hr1.46 g/amp-hr
0.16812
8.3209
9.10 Electron Work Function
9.11 Other Chemical Properties
Chemical Stability, Ionization
Chemical Stability, Flammability, Ionization, Solubility
10 Atomic
10.1 Atomic Number
10.2 Electron Configuration
10.3 Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
10.3.1 Crystal Lattice
10.4 Atom
10.4.1 Number of Protons
10.5.1 Number of Neutrons
10.6.1 Number of Electrons
11.2 Radius of an Atom
11.2.1 Atomic Radius
147.00 pm227.00 pm
112
265
11.5.2 Covalent Radius
160.00 pm203.00 pm
96
260
11.5.3 Van der Waals Radius
200.00 pm275.00 pm
139
348
11.6 Atomic Weight
47.87 amu39.10 amu
6.94
294
11.7 Atomic Volume
10.64 cm3/mol45.46 cm3/mol
1.39
71.07
11.9 Adjacent Atomic Numbers
11.9.1 Previous Element
11.9.2 Next Element
11.10 Valence Electron Potential
95.20 (-eV)10.40 (-eV)
8
392.42
11.11 Lattice Constant
295.08 pm532.80 pm
228.58
891.25
11.13 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
11.14 Lattice C/A Ratio
12 Mechanical
12.1 Density
12.1.1 Density At Room Temperature
4.51 g/cm30.86 g/cm3
0.534
40.7
12.3.1 Density When Liquid (at m.p.)
4.11 g/cm30.83 g/cm3
0.512
20
12.7 Tensile Strength
13.2 Viscosity
13.3 Vapor Pressure
13.3.1 Vapor Pressure at 1000 K
13.3.3 Vapor Pressure at 2000 K
13.5 Elasticity properties
13.5.1 Shear Modulus
44.00 GPa1.30 GPa
1.3
222
13.6.1 Bulk Modulus
110.00 GPa3.10 GPa
1.6
462
13.7.3 Young's Modulus
116.00 GPa3.53 GPa
1.7
528
13.9 Poisson Ratio
13.10 Other Mechanical Properties
14 Magnetic
14.1 Magnetic Characteristics
14.1.1 Specific Gravity
14.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
14.1.3 Permeability
14.1.5 Susceptibility
14.2 Electrical Properties
14.2.1 Electrical Property
14.2.2 Resistivity
420.00 nΩ·m72.00 nΩ·m
0.18
961
14.3.1 Electrical Conductivity
0.02 106/cm Ω0.14 106/cm Ω
0.00666
0.63
15.1.4 Electron Affinity
7.60 kJ/mol48.40 kJ/mol
0
222.8
16 Thermal
16.1 Specific Heat
0.52 J/(kg K)0.75 J/(kg K)
0.11
3.6
16.3 Molar Heat Capacity
25.06 J/mol·K29.60 J/mol·K
16.443
62.7
16.4 Thermal Conductivity
21.90 W/m·K102.50 W/m·K
6.3
429
16.5 Critical Temperature
16.6 Thermal Expansion
8.60 µm/(m·K)83.30 µm/(m·K)
4.5
97
17.3 Enthalpy
17.3.1 Enthalpy of Vaporization
429.00 kJ/mol77.50 kJ/mol
7.32
799.1
17.4.1 Enthalpy of Fusion
15.48 kJ/mol2.32 kJ/mol
2.1
35.23
17.4.2 Enthalpy of Atomization
468.60 kJ/mol89.50 kJ/mol
61.5
837
17.7 Standard Molar Entropy
27.30 J/mol.K64.70 J/mol.K
9.5
198.1