Potassium (K)

Symbol K
Atomic Number 19
Atomic Weight 39.0983
Group 1 (alkali metals or hydrogen family/lithium family)
IA (Old IUPAC), IA (CAS)
Period 4
Block s

Planetary Bohr Model of K
Lewis Dot Diagram of K

Physical Properties

Density 0.86 g/cm3
Atomic Volume 45.3 cm3/mole
Atomic Radius 2.35 angstroms
Covalent Radius 196 pm
Radioactive No

States

Melting Point 63.25 °C
Boiling Point 760.0 °C
Heat Of Fusion 2.33 kJ/mole
Heat Of Vaporization 76.9 kJ/mole

Energy

Electronegativity 0.8 (Pauling Scale)
Electron Affinity -48 kJ/mol
1st Ionization Energy 419 kJ/mol
Specific Heat Capacity 0.757 J g−1 K−1
Thermal Conductivity 102.5 W·m−1·K−1

Electrons and Oxidation

Oxidation States 1
Electrons Per Shell 2 8 8 1
Electron Configuration [Ar] 4s1
1s2 2s2 2p6 3s2 3p6 4s1

Translations

English Potassium
Deutsch Kalium
Lëtzebuergesch Kalium
Nederlands Kalium
Afrikaans Kalium
Frysk Kalium
Dansk Kalium
Svenska Kalium
Norsk Kalium
Íslenska Kaln
Føroysk Kalium
Latin Kalium
Français Potassium
Español Potasio
Catalana Potassi
Occitana Potassi
Português Potssio
Galego Potasio
Italiano Potassio
Furlan Potassi
Român Potasiu (ro: Kaliu)
Moldavian Potasiu (ro: Kaliu)
Armãneashte Caliumu
Русский ?????
Українска ?????
Byelorussian ?????
Polska Potas
Kaszëbsczi Kali
Čech Draslk
Slovenský Draslk
Slovenščina Kalij
Hrvatska Kalij
Српски ????j??
Bosnian Kalij
Македонски ??????
Български ?????
Lietuviškai Kalis
Lao K?lijs
Sudovian Kalijan
Cymraeg Potasiwm
Gaeilge na hÉireann Potaisiam
Gàidhlig na h Potaisiam
Gaelg Vanninagh Potashum
Cornish Calyum
Brezhoneg Potasiom
Ελληνική ?????
Shqip Kalium
Ossetian ?????
Euskera Potasioa
Georgian ???????
Suomi Kalium
Eesti Kaalium
Magyar Klium
Türkçe Potasyum
Kazakh ?????
Uzbek ?????
Tajik Kali'
Mongolian ????
日本語 ???? [kariumu]
中国话 ?
ไทย ??????????
Vietnamese Kali
Bahasa Melayu Kalium
العربيه ????????
Il-Malti Potassjum
עברית ?????
Esperanto Kalio

History

Discovered In
1807
Discovered By
Sir Humphrey Davy
Discovered At
England
Word Origin
From the English word "potash" (pot ashes) and the Arabic word "qali" meaning alkali (the origin of the symbol K comes from the Latin word "kalium")