potassium

Also known as K, element 19, 19K

élément chimique de numéro atomique 19 et de symbole K

OverviewAI-generated

Potassium is a chemical element with the symbol K and atomic number 19. Its standard atomic mass is 39.0983. The element was discovered in 1807. It exhibits oxidation states of -1 and 1. The chemical formula is represented as K.

Physical properties include a melting point of 336.4 and a boiling point of 1038.7. The density is 0.862, and the standard molar entropy is 64.2. Electronegativity is measured at 0.82, with an ionic radius of 1.64. The electron configuration is [Ar] 4s¹. The Unicode character for potassium is 鉀.

Synthesized by Vinony from 30 facts across 4 sources: Wikidata, PubMed, PubChem, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: K
Molecular weight: 39.0983 g/mol
IUPAC name: potassium
SMILES: [K]
InChIKey: ZLMJMSJWJFRBEC-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

306,002 papers

Physiology and pathophysiology of potassium homeostasis.Advances in physiology education · 2016
Potassium Intake, Bioavailability, Hypertension, and Glucose Control.Nutrients · 2016
Potassium: A Frontier in Osteoporosis.Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme · 2024
Potassium and the kidney.Nature reviews. Nephrology · 2026
Potassium.Advances in food and nutrition research · 2021

via PubMed

Wikidata facts

Subclass of: s-block
Part of: alkali metal
Named after: potash
Mass: 39.0983
Image: Kalium.jpg

Show 21 more facts

Commons gallery: Potassium
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
oxidation state: 1
element symbol: K
discoverer or inventor: Humphry Davy
Commons category: Potassium
topic's main category: Category:Potassium
atomic number: 19
time of discovery or invention: 1807-00-00
boiling point: 765.5
melting point: 63.2
density: 0.856
chemical formula: K
canonical SMILES: [K]
standard molar entropy: 64.2
electronegativity: 0.82
vapor pressure: 41.70
safety classification and labelling: Regulation (EC) No. 1272/2008
Unicode character: 鉀
electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
ionic radius: 1.64

Sources (10)

via Wikidata · CC0

Article · Français

Le potassium est l'élément chimique de numéro atomique 19, de symbole K (du latin kalium). C’est un métal alcalin mou, d’aspect blanc métallique, légèrement bleuté, que l’on trouve naturellement lié à d’autres éléments dans l’eau de mer et dans de nombreux minéraux. Il s’oxyde rapidement au contact de l’air et réagit violemment avec l’eau. Il ressemble chimiquement au sodium.

Abstract from DBpedia / Wikipedia · CC BY-SA