Keywords: Дмитрий Иванович Менделеев 9.jpg A portrait of Russian chemist Дмит� ий Иванович � енделеев Dmitri Ivanovich Mendeleyev February 1834 2 Feb 1907 Source shakchmatovo amr-museum ru/ gallery/gal_r15 htm PD-old Dmitri Mendeleev |