Element K

The periodic table is an arrangment of the chemical elements ordered by atomic number so that periodic properties of the elements (chemical periodicity) are made clear.

  1. Element Kr
  2. Element K

The Elements by K. Sorbe. 1701 W Milwaukee Ave. Storm Lake, IA 50588. (712) 732-2385. The Elements at Prairie Trail. 1380 SW Vintage Parkway. Ankeny, IA 50023. (515) 264-5563. Before a name and symbol are approved, an element may be referred to by its atomic number (e.g., element 120) or by its systematic element name. The systematic element name is a temporary name that is based on the atomic number as a root and the -ium ending as a suffix. For example, element 120 has the temporary name unbinilium. 1-16 of 168 results for 'Element K2 Flashlight' Into Thin Air. 2.8 out of 5 stars 5. Prime Video $0.00 with a Prime membership. Starring: Lorenzo Sartini and Brady Miller Directed by: Lorenzo Sartini.

Explore the chemical elements through this periodic table

Group123456789101112131415161718
Period
1
Hydrogen
Helium
2
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
3
Sodium
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
4
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
5
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum
Tc
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
6
Caesium
Barium
*
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Po
Polonium
At
Astatine
Rn
Radon
7
Fr
Francium
Ra
Radium
**
Lr
Lawrencium
Rf
Rutherfordium
Db
Dubnium
Sg
Seaborgium
Bh
Bohrium
Hs
Hassium
Mt
Meitnerium
Ds
Darmstadtium
Rg
Roentgenium
Cn
Copernicium
Nh
Nihonium
Fl
Flerovium
Mc
Moscovium
Lv
Livermorium
Ts
Tennessine
Og
Oganesson
*Lanthanoids*
Lanthanum
Cerium
Praseodymium
Neodymium
Pm
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
**Actinoids**
Ac
Actinium
Th
Thorium
Pa
Protactinium
U
Uranium
Np
Neptunium
Pu
Plutonium
Am
Americium
Cm
Curium
Bk
Berkelium
Cf
Californium
Es
Einsteinium
Fm
Fermium
Md
Mendelevium
No
Nobelium

The standard form of the periodic table shown here includes periods (shown horizontally) and groups (shown vertically). The properties of elements in groups are similar in some respects to each other.

Element Kr

There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful and the most common. The periodic table is a masterpiece of organised chemical information and the evolution of chemistry's periodic table into the current form is an astonishing achievement.

Fast

Element Potassium - K

Comprehensive data on the chemical element Potassium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Potassium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Element

Potassium Menu

  • Potassium Page One
  • Potassium Page Two
  • Potassium Page Three

Overview of Potassium

  • Atomic Number: 19
  • Group: 1
  • Period: 4
  • Series: Alkali Metals

Potassium's Name in Other Languages

  • Latin: Kalium
  • Czech: Draslík
  • Croatian: Kalij
  • French: Potassium
  • German: Kalium - s
  • Italian: Potassio
  • Norwegian: Kalium
  • Portuguese: Potássio
  • Russian: Калий
  • Spanish: Potasio
  • Swedish: Kalium

Atomic Structure of Potassium

  • Atomic Radius: 2.77Å
  • Atomic Volume: 45.46cm3/mol
  • Covalent Radius: 2.03Å
  • Cross Section (Thermal Neutron Capture) σa/barns: 2.1
  • Crystal Structure: Cubic body centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6 4s1
  • Electrons per Energy Level: 2,8,8,1
    Shell Model
  • Ionic Radius: 1.38Å
  • Filling Orbital: 4s1
  • Number of Electrons (with no charge): 19
  • Number of Neutrons (most common/stable nuclide): 20
  • Number of Protons: 19
  • Oxidation States: 1
  • Valence Electrons: 4s1
    Electron Dot Model

Chemical Properties of Potassium

  • Electrochemical Equivalent: 1.4587g/amp-hr
  • Electron Work Function: 2.3eV
  • Electronegativity: 0.82 (Pauling); 0.91 (Allrod Rochow)
  • Heat of Fusion: 2.334kJ/mol
  • Incompatibilities:
  • Ionization Potential
    • First: 4.341
    • Second: 31.625
    • Third: 45.72
  • Valence Electron Potential (-eV): 10.4

Physical Properties of Potassium

  • Atomic Mass Average: 39.0983
  • Boiling Point: 1032K 759°C 1398°F
  • Coefficient of lineal thermal expansion/K-1: 83E-6
  • Conductivity
    Electrical: 0.139 106/cm Ω
    Thermal: 1.024 W/cmK
  • Density: 0.862g/cc @ 300K
  • Description:
    Very soft silvery metal that quickly oxidizes to white in air and reacts violently in water.
  • Elastic Modulus:
    • Bulk: 3.1/GPa
    • Rigidity: 1.3/GPa
    • Youngs: 3.53/GPa
  • Enthalpy of Atomization: 89.5 kJ/mole @ 25°C
  • Enthalpy of Fusion: 2.32 kJ/mole
  • Enthalpy of Vaporization: 77.5 kJ/mole
  • Flammablity Class:
  • Freezing Point:see melting point
  • Hardness Scale
    • Brinell: 0.363 MN m-2
    • Mohs: 0.4
  • Heat of Vaporization: 79.87kJ/mol
  • Melting Point: 336.5K 63.35°C 146.03°F
  • Molar Volume: 45.46 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.75J/gK
  • Vapor Pressure = [email protected]°C

Regulatory / Health

  • CAS Number
    • 7440-09-7
  • RTECS: TS6465000
  • OSHAPermissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSHRecommended Exposure Limit (REL)
    • No limits set by NIOSH
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 1620
    • Bone/p.p.m: 2100
    • Liver/p.p.m: 16000
    • Muscle/p.p.m: 16000
    • Daily Dietary Intake: 1400-7400 mg
    • Total Mass In Avg. 70kg human: 140 g

Who / Where / When / How

  • Discoverer: Sir Humphrey Davy
  • Discovery Location: London England
  • Discovery Year: 1807
  • Name Origin:
    From potash (pot ash); K from latin: kalium
  • Abundance of Potassium:
    • Earth's Crust/p.p.m.: 21000
    • Seawater/p.p.m.: N/A
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 145000
  • Sources of Potassium:
    Found in minerals like carnallite [(KMgCl3).6H2O], sylvite (KCL) and alunite. Annual world production is around 200 tons. Primary mining areas are in Germany, Spain, Canada, USA and Italy.
  • Uses of Potassium:
    Used as potash in making glass, soap, lenses and salt substitute. Also as saltpeter, potassium nitrate (KNO3) it is used to make explosives and to color fireworks in mauve.
  • Additional Notes:
    Formerly called kalium hence the symbol 'K'.

Potassium Menu

  • Potassium Page One
  • Potassium Page Two
  • Potassium Page Three

References

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Related Resources

  • Anatomy of the Atom
    Answers many questions regarding the structure of atoms.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.
Element

Element K

Citing this page

Element

If you need to cite this page, you can copy this text:

Element K

Kenneth Barbalace. Periodic Table of Elements - Potassium - K. EnvironmentalChemistry.com. 1995 - 2021. Accessed on-line: 5/3/2021
https://EnvironmentalChemistry.com/yogi/periodic/K.html
.

Linking to this page

If you would like to link to this page from your website, blog, etc., copy and paste this link code (in red) and modify it to suit your needs:

<a href='https://EnvironmentalChemistry.com/yogi/periodic/K.html'>echo Periodic Table of Elements: Potassium - K (EnvironmentalChemistry.com)</a>- Comprehensive information for the element Potassium - K is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.
.

NOTICE: While linking to articles is encouraged, OUR ARTICLES MAY NOT BE COPIED TO OR REPUBLISHED ON ANOTHER WEBSITE UNDER ANY CIRCUMSTANCES.

PLEASE, if you like an article we published simply link to it on our website do not republish it.