Assertion: potassium | /r/HasProperty | element
Facets:
Source sentences:
text: Potassium is an element, atomic number 19 and the symbol K. Because the pure alkali metal oxidizes rapidly in air and water, it is normally found as an ionic salt.
text: Potassium is one of the many elements found in fireworks and pyrotechnics of all kinds.
text: Potassium is an element that helps the body carry out day-to-day work.