Generating Graphs...
Loading...

What is Potassium?

All Metals

Nihonium
Add to compare
Moscovium
Add to compare
Tennessine
Add to compare
Potassium In Periodic Table

Symbol
K

Group Number
1
17
📊

Period Number
4
📊

Block
s block
📊

Element Family
Alkali
📊

CAS Number
7440097
70

Space Group Name
Im_ 3m

Space Group Number
229.00
1
📊

Facts about Potassium

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 of Potassium

Who Discovered
Humphry Davy

Discovery
In 1807

Abundance of Potassium

Abundance In Universe
0.00 %
📊

Abundance In Sun
0.00 %
📊

Abundance In Meteorites
0.07 %
📊

Abundance In Earth's Crust
1.50 %
📊

Abundance In Oceans
0.04 %
📊

Abundance In Humans
0.20 %
📊

Uses of Potassium

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
NA

Biological Properties

Toxicity
Toxic
📊

Present in Human Body
📊

In Blood
1,620.00 Blood/mg dm-3

In Bone
2,100.00 p.p.m.

Physical Properties of Potassium

Melting Point
63.65 °C
77
📊

Boiling Point
774.00 °C
72
📊

Appearance of Potassium

Physical State
Solid
📊

Color
Silvery Gray

Luster
NA
📊

Hardness of Potassium

Mohs Hardness
0.40
📊

Brinell Hardness
0.36 MPa
📊

Vickers Hardness
Not Available
📊

Speed of Sound
2,000.00 m/s
45
📊

Optical Properties

Refractive Index
Not Available
📊

Reflectivity
Not Available
📊

Allotropes

α Allotropes
Not Available

β Allotropes
Not Available

γ Allotropes
Not Available

Chemical Properties of Potassium

Chemical Formula
K

Isotopes of Potassium

Known Isotopes
20
📊

Electronegativity

Pauling Electronegativity
0.82
📊

Sanderson Electronegativity
0.45
📊

Allred Rochow Electronegativity
0.91
📊

Mulliken-Jaffe Electronegativity
0.73
📊

Allen Electronegativity
0.73
📊

Electropositivity

Pauling Electropositivity
3.18
📊

Ionization Energies

1st Energy Level
418.80 kJ/mol
📊

2nd Energy Level
3,052.00 kJ/mol
📊

3rd Energy Level
4,420.00 kJ/mol
📊

4th Energy Level
5,877.00 kJ/mol
📊

5th Energy Level
7,975.00 kJ/mol
📊

6th Energy Level
9,590.00 kJ/mol
📊

7th Energy level
11,343.00 kJ/mol
📊

8th Energy Level
14,944.00 kJ/mol
📊

9th Energy Level
16,963.70 kJ/mol
📊

10th Energy Level
48,610.00 kJ/mol
📊

11th Energy Level
54,490.00 kJ/mol

12th Energy Level
60,730.00 kJ/mol

13th Energy Level
68,950.00 kJ/mol

14th Energy Level
75,900.00 kJ/mol

15th Energy Level
83,080.00 kJ/mol

16th Energy Level
93,400.00 kJ/mol

17th Energy Level
99,710.00 kJ/mol

18th Energy Level
444,880.00 kJ/mol
📊

19th Energy Level
476,063.00 kJ/mol

20th Energy Level
Not Available

21st Energy Level
Not Available

22nd Energy Level
Not Available

23rd Energy Level
Not Available

24th Energy Level
Not Available

25th Energy Level
Not Available

26th Energy Level
Not Available

27th Energy Level
Not Available

28th Energy Level
Not Available

29th Energy Level
Not Available

30th Energy Level
Not Available

Electrochemical Equivalent
1.46 g/amp-hr
47
📊

Electron Work Function
2.30 eV
44
📊

Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility

Atomic Properties of Potassium

Atomic Number
19
87
📊

Electron Configuration
[Ar] 4s1

Crystal Structure
Body Centered Cubic (BCC)
📊

Crystal Lattice
BCC-Crystal-Structure-.jpg#100

Atom of Potassium

Number of Protons
19
📊

Number of Neutrons
20
📊

Number of Electrons
19
📊

Radius of an Atom

Atomic Radius
227.00 pm
📊

Covalent Radius
203.00 pm
📊

Van der Waals Radius
275.00 pm
📊

Atomic Weight
39.10 amu
81
📊

Atomic Volume
45.46 cm3/mol
3
📊

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential
10.40 (-eV)
63
📊

Lattice Constant
532.80 pm
12
📊

Lattice Angles
π/2, π/2, π/2

Lattice C/A Ratio
Not Available
📊

Mechanical Properties of Potassium

Density of Potassium

Density At Room Temperature
0.86 g/cm3
📊

Density When Liquid (at m.p.)
0.83 g/cm3
📊

Tensile Strength
Not Available
📊

Viscosity
Not Available
📊

Vapor Pressure of Potassium

Vapor Pressure at 1000 K
Not Available
📊

Vapor Pressure at 2000 K
Not Available
📊

Elasticity properties

Shear Modulus
1.30 GPa
📊

Bulk Modulus
3.10 GPa
📊

Young's Modulus
3.53 GPa
📊

Poisson Ratio
Not Available
📊

Other Mechanical Properties
NA

Magnetic Properties of Potassium

Magnetic Characteristics of Potassium

Specific Gravity
0.86
📊

Magnetic Ordering
Paramagnetic
📊

Permeability
Not Available
📊

Susceptibility
Not Available
📊

Electrical Properties

Electrical Property
Conductor
📊

Resistivity
72.00 nΩ·m
📊

Electrical Conductivity
0.14 106/cm Ω
📊

Electron Affinity
48.40 kJ/mol
📊

Thermal Properties of Potassium

Specific Heat
0.75 J/(kg K)
6
📊

Molar Heat Capacity
29.60 J/mol·K
6
📊

Thermal Conductivity
102.50 W/m·K
15
📊

Critical Temperature
2,223.00 K
3

Thermal Expansion
83.30 µm/(m·K)
3
📊

Enthalpy of Potassium

Enthalpy of Vaporization
77.50 kJ/mol
📊

Enthalpy of Fusion
2.32 kJ/mol
📊

Enthalpy of Atomization
89.50 kJ/mol
📊

Standard Molar Entropy
64.70 J/mol.K
18
📊

Potassium Metal

Metals have been an inseparable component of major civilizations since centuries. Although metals were utilized since time unknown, researchers put considerable efforts in giving them appropriate names and defining their different properties and characteristics. This nomenclature process helped in arranging these metals in a well-organized fashion, known as the periodic table. In this periodic table, Potassium metal is also represented by the symbol K. This atomic symbol of Potassium is useful in indicating the position of metal K in the periodic table. If you are curious-headed or a science-geek, the common questions about metals are What is Potassium? What are its physical, chemical, mechanical, electrical and thermal properties? Find all the relevant facts about K metals in the following sections.

Periodic Table of Potassium

Periodic table of Potassium comments over its position in the periodic table, on the basis of parameters like group number, period row, atomic number and orbital block. The metals which have electrons falling in the same sub-shell are grouped under the same block corresponding to its respective orbital. Potassium metal belongs to Alkali Metals category of the periodic table. Metals down a group have same valency while metals across a period have the same number of shells. Its group number (column number) is 1, whereas its period number is 4. It is placed under s block of the periodic table & is one of the prominent s block elements.

Potassium Metal Properties

Metals have certain properties by which they can be distinguished from one another. Magnetic and Atomic Structure of Potassium are few widely searched properties. Using the comparison facility, you can not only view the individual metal properties, but also compare the properties of multiple metals to get a thorough comparative analysis between the metals of your choice. Atomic number is a basic building block for the arrangement of metals in the periodic table. Atomic number of Potassium is 19 and its atomic weight is 39.10 amu. The electrons in its atom are arranged in orbitals as [Ar] 4s1. Nuclear particles in Potassium atom are 20 neutrons, 19 protons and 19 electrons.

Physical and Chemical Characteristics of Potassium

Physical and chemical characteristics of Potassium are two major criteria while comparing this metal with other metals. Physical Properties of Potassium include its external appearance, shininess at surface, color, etc. Properties like density, viscosity, melting and boiling point are also covered in this section. At room temperature, this metal is a Silvery Gray Solid. It starts melting at 63.65 °C. All these Potassium metal properties together define what is Potassium?

Modern Periodic Table

Modern Periodic Table
Group →

Period ↓

1

2

3

4

5

6

7

1

H

2

3

La-Lu
Ac-Lr

4

5

6

7

8

9

10

11

12

13

B

14

C
Si
Ge

15

N
P
As
Sb

16

O
S
Se
Te

17

F
Cl
Br
I
At

18

He
Ne
Ar
Kr
Xe
Rn
Og