Assertion: potassium iodide's symbol | /r/ObjectUse | used by chemist
Facets:
value: over
type: TEMPORAL
Source sentences:
text: Whilst Davy named his new metal potassium after the potash, Berzelius, the Swedish chemist who invented the international system of chemical symbols now used by chemists the world over, preferred the name kalium for the metal, better reflecting its true origins, he thought.