👉 Stannide is a chemical element with the symbol Sn and atomic number 43. It is a group-16 element, meaning it has one electron in its outermost shell. Stannides are primarily found in the Earth's crust as a mixture of several other elements, including chromium, molybdenum, and tin. They have a high melting point (around 2300°C) and a low density at room temperature.