Selenium (Se) is a chemical element with atomic number (Z) 34, group 16, period 4, and atomic weight 78.971. The Selenium (Se) is a non metallic chemical element, that resembles sulphur and tellurium and has good photovoltaic and photoconductive properties, used extensively in electronics, such as photocells, light meters and solar cells. (Refer to the Chemical Element; Periodic Table)
