gallium sesquioxide
1Samarium — promethium ← samarium → europium ↑ Sm ↓ …
2Curium — This article is about the chemical element. For the ancient city located in Cyprus, see Kourion. americium ← curium → berkelium …
3Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… …
4Kalifornium — Eigenschaften …
5Boron trioxide — Other …
