Russia 🇷🇺 @Russia
⚗️ #OTD in 1834 a Russian genius, one of the most prolific chemists in history Dmitry #Mendeleev was born. His greatest achievement - one that he will be forever cherished for by the scientific community and dreaded by school kids - is the #PeriodicTable of elements ⚛️ https://t.co/wmcADoDnCk — PolitiTweet.org