🌐EnglishEnglishPolskiالعربيةहिन्दी한국어中文EntityQ3610444· pop 12· linked from 7 articlesDöbereiner's triadshistorical scientific theoryAvailable in 12 languagesالعربيةहिन्दीDanishHungarianIrishMalayalamPolskiPunjabiTeluguConnectionsPeriodic tableConceptlithiumEntityCategoriesChemical classificationCleanup tagged articles with a reason field from December 2013History of chemistry