Russia 🇷🇺 @Russia
#OTD🧪 in 1869 Dmitri #Mendeleev created his periodic table of chemical elements. ⚗️ Today school students start fathoming the mysteries of science from this tabular display of the elements, arranged by the #Russian🇷🇺 genius. #Chemistry must be respected😎 https://t.co/t8007pKA04 — PolitiTweet.org