Dmitri+Mendeleev(GD)

​ [] Dmitri Mendeleev 1834-107 Discovery: 1863

Mendeleev was born in Russia to Ivan Pavlovich Mendeleev and Maria Dmitrievna Mendeleeva. He was 1 of 14 and his father and mother died when he was very young. In 1849, he relocated to St. Petersburg where he entered the main pedagogical institute. After Graduation he developed tuberculosis which caused him to again relocate to the Crimean Peninsula where he attended the Simferopol gymnasium. He returned with fully restored health to Saint Petersburg in 1857.

He was the first to arranged the periodic table by increasing atomic weight and grouping them by similarity of properties. He also predicted the existence and properties of new elements and pointed out atomic weights that were wrong. . His tables did not include any ofthe Noble Gases []