Periodic Table
Symbol
K
Group Number
1
Rank: 17 (Overall)
0
17
👆🏻
Period Number
4
Rank: 4 (Overall)
2
7
👆🏻
Block
s block
Element Family
Alkali
CAS Number
7440097
Rank: 70 (Overall)
7429905
54386242
👆🏻
Space Group Name
Im_ 3m
Space Group Number
229.00
Rank: 2 (Overall)
11
276
👆🏻
Facts
Interesting Facts
- In the list of most abundant element Potassium is ranked 7th.
- Potassium can easily be sliced (chopped) down using knife.
Sources
Found in Minerals, Mining
History
Who Discovered
Humphry Davy
Discovery
In 1807
Abundance
Abundance In Universe
0.00 %
Rank: 10 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 9 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.07 %
Rank: 9 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
1.50 %
Rank: 6 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
0.04 %
Rank: 3 (Overall)
0
1.1
👆🏻
Abundance In Humans
0.20 %
Rank: 3 (Overall)
0
1.4
👆🏻
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.
Industrial Uses
Ammunition Industry, Chemical Industry
Medical Uses
Pharmaceutical Industry
Other Uses
-
Biological Properties
Toxicity
Toxic
Present in Human Body
✔
✘
76% - Alkali Metals Metals have it !
In Blood
1,620.00 Blood/mg dm-3
Rank: 2 (Overall)
0
1970
👆🏻
In Bone
2,100.00 p.p.m.
Rank: 3 (Overall)
0
170000
👆🏻
Physical
Melting Point
63.65 °C
Rank: 77 (Overall)
-38.83
3410
👆🏻
Boiling Point
774.00 °C
Rank: 74 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silvery Gray
Luster
-
Hardness
Mohs Hardness
0.40
Rank: 25 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
0.36 MPa
Rank: 69 (Overall)
0.14
3490
👆🏻
Vickers Hardness
100.00 MPa
Rank: 63 (Overall)
0
3920
👆🏻
Speed of Sound
2,000.00 m/s
Rank: 62 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.33
Rank: 42 (Overall)
0.155
3.41
👆🏻
Reflectivity
72.00 %
Rank: 11 (Overall)
5
97
👆🏻
Allotropes
✔
✘
8% - Alkali Metals Metals
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
K
Isotopes
Known Isotopes
20
Rank: 19 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
0.82
Rank: 52 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
0.45
Rank: 51 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
0.91
Rank: 40 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
0.73
Rank: 52 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
0.73
Rank: 64 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
3.18
Rank: 3 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
418.80 kJ/mol
Rank: 87 (Overall)
375.7
26130
👆🏻
2nd Energy Level
3,052.00 kJ/mol
Rank: 5 (Overall)
392.8
28750
👆🏻
3rd Energy Level
4,420.00 kJ/mol
Rank: 8 (Overall)
392.8
34230
👆🏻
4th Energy Level
5,877.00 kJ/mol
Rank: 18 (Overall)
375.7
37066
👆🏻
5th Energy Level
7,975.00 kJ/mol
Rank: 14 (Overall)
392
97510
👆🏻
6th Energy Level
9,590.00 kJ/mol
Rank: 19 (Overall)
1007
105800
👆🏻
7th Energy level
11,343.00 kJ/mol
Rank: 17 (Overall)
1007
114300
👆🏻
8th Energy Level
14,944.00 kJ/mol
Rank: 13 (Overall)
730
125300
👆🏻
9th Energy Level
16,963.70 kJ/mol
Rank: 15 (Overall)
1007
134700
👆🏻
10th Energy Level
48,610.00 kJ/mol
Rank: 3 (Overall)
392
144300
👆🏻
11th Energy Level
54,490.00 kJ/mol
Rank: 4 (Overall)
392
169988
👆🏻
12th Energy Level
60,730.00 kJ/mol
Rank: 15 (Overall)
0
189368
👆🏻
13th Energy Level
68,950.00 kJ/mol
Rank: 4 (Overall)
1007
76015
👆🏻
14th Energy Level
75,900.00 kJ/mol
Rank: 5 (Overall)
380
86450
👆🏻
15th Energy Level
83,080.00 kJ/mol
Rank: 13 (Overall)
33000
100700
👆🏻
16th Energy Level
93,400.00 kJ/mol
Rank: 7 (Overall)
375.7
109480
👆🏻
17th Energy Level
99,710.00 kJ/mol
Rank: 8 (Overall)
375.7
122200
👆🏻
18th Energy Level
4,196.00 kJ/mol
Rank: 76 (Overall)
0
134810
👆🏻
19th Energy Level
419.20 kJ/mol
Rank: 89 (Overall)
375.7
148700
👆🏻
20th Energy Level
419.00 kJ/mol
Rank: 79 (Overall)
0
171200
👆🏻
21st Energy Level
419.20 kJ/mol
Rank: 88 (Overall)
375.7
179100
👆🏻
22nd Energy Level
419.00 kJ/mol
Rank: 73 (Overall)
330
184900
👆🏻
23rd Energy Level
419.20 kJ/mol
Rank: 84 (Overall)
357.6
198800
👆🏻
24th Energy Level
419.20 kJ/mol
Rank: 85 (Overall)
297.3
195200
👆🏻
25th Energy Level
419.20 kJ/mol
Rank: 77 (Overall)
0
121900
👆🏻
26th Energy Level
419.20 kJ/mol
Rank: 85 (Overall)
357.6
127700
👆🏻
27th Energy Level
419.20 kJ/mol
Rank: 81 (Overall)
0
133800
👆🏻
28th Energy Level
419.20 kJ/mol
Rank: 84 (Overall)
297.3
139800
👆🏻
29th Energy Level
419.20 kJ/mol
Rank: 86 (Overall)
0
148100
👆🏻
30th Energy Level
419.00 kJ/mol
Rank: 80 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
1.46 g/amp-hr
Rank: 51 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
2.30 eV
Rank: 56 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility
Atomic
Atomic Number
19
Rank: 87 (Overall)
3
117
👆🏻
Electron Configuration
[Ar] 4s1
Crystal Structure
Body Centered Cubic (BCC)
Crystal Lattice
Atom
Number of Protons
19
Rank: 86 (Overall)
3
117
👆🏻
Number of Neutrons
20
Rank: 65 (Overall)
4
285
👆🏻
Number of Electrons
19
Rank: 86 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
227.00 pm
Rank: 4 (Overall)
0
348
👆🏻
Covalent Radius
203.00 pm
Rank: 9 (Overall)
0
260
👆🏻
Van der Waals Radius
275.00 pm
Rank: 7 (Overall)
0
348
👆🏻
Atomic Weight
39.10 amu
Rank: 81 (Overall)
6.94
294
👆🏻
Atomic Volume
45.46 cm3/mol
Rank: 4 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
10.40 (-eV)
Rank: 67 (Overall)
0
392.42
👆🏻
Lattice Constant
532.80 pm
Rank: 13 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, π/2
Lattice C/A Ratio
1.69
Rank: 10 (Overall)
0.423
1.9
👆🏻
Mechanical
Density
Density At Room Temperature
0.86 g/cm3
Rank: 88 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
0.83 g/cm3
Rank: 89 (Overall)
0.512
41
👆🏻
Tensile Strength
16.00 MPa
Rank: 47 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 9 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 16 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 34 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
1.30 GPa
Rank: 66 (Overall)
1.3
222
👆🏻
Bulk Modulus
3.10 GPa
Rank: 64 (Overall)
0
462
👆🏻
Young's Modulus
3.53 GPa
Rank: 71 (Overall)
0
528
👆🏻
Poisson Ratio
0.35
Rank: 9 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic
Magnetic Characteristics
Specific Gravity
0.86
Rank: 86 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 13 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 23 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
Conductor
Resistivity
72.00 nΩ·m
Rank: 37 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.14 106/cm Ω
Rank: 16 (Overall)
0
0.63
👆🏻
Electron Affinity
48.40 kJ/mol
Rank: 27 (Overall)
0
222.8
👆🏻
Thermal
Specific Heat
0.75 J/(kg K)
Rank: 6 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
29.60 J/mol·K
Rank: 8 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
102.50 W/m·K
Rank: 15 (Overall)
0
429
👆🏻
Critical Temperature
2,223.00 K
Rank: 14 (Overall)
26.3
3695
👆🏻
Thermal Expansion
83.30 µm/(m·K)
Rank: 3 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
77.50 kJ/mol
Rank: 81 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
2.32 kJ/mol
Rank: 67 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
89.50 kJ/mol
Rank: 70 (Overall)
61.5
837
👆🏻
Standard Molar Entropy
64.70 J/mol.K
Rank: 19 (Overall)
9.5
198.1
👆🏻