Cadmium, Lithium, Selenium

New chemical elements cadmium, lithium, and selenium were isolated, expanding the knowledge of the periodic table and contributing to various scientific and industrial applications.
 Friedrich Strohmeyer, Johan August Arfwedson, and Jöns Jacob Berzelius Germany and Sweden 1817 Cadmium, Lithium, Selenium

New chemical elements cadmium, lithium, and selenium were isolated, expanding the knowledge of the periodic table and contributing to various scientific and industrial applications.