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- 🇬🇧 Selenium
- 🇺🇦 Селен
- 🇨🇳 硒
- 🇳🇱 Selenium
- 🇫🇷 Sélénium
- 🇩🇪 Selen
- 🇮🇱 סלניום
- 🇮🇹 Selenio
- 🇯🇵 セレン
- 🇵🇹 Selênio
- 🇪🇸 Selenio
- 🇸🇪 Selen
- 🇷🇺 Селен
- Discoveror: Jöns Berzelius
- Place of discovery: Sweden
- Date of discovery: 1817
- Origin of name : from the Greek word "selene" meaning "moon".
Selenium (Gr. Selen, moon) was discovered by Jöns Jacob Berzelius in 1817. He reported that tellurium was present in sulphuric acid from a Swedish factory, but in the following year decided that the impurity was not tellurium but another closely related element that he subsequently identified as selenium.