Keywords: Дмитрий Иванович Менделеев 3.jpg A portrait of Russian chemist Ð”Ð¼Ð¸Ñ‚Ñ Ð¸Ð¹ Иванович Ренделеев Dmitri Ivanovich Mendeleyev February 1834 2 Feb 1907 Source scienceworld wolfram com/ biography/Mendeleev html PD-old Dmitri Mendeleev |