50Sn118.71
Tin (Sn)
Element 50 · Post-transition metal
Tin (Sn) is a chemical element with atomic number 50. It is classified as a post-transition metal in period 5, group 14 of the periodic table (the p-block). Its standard atomic weight is 118.71 u and its ground-state electron configuration is [Kr] 4d¹⁰ 5s² 5p².
Tin facts
| Atomic number (Z) | 50 |
|---|---|
| Symbol | Sn |
| Standard atomic weight | 118.71 u |
| Category | Post-transition metal |
| Group | 14 |
| Period | 5 |
| Block | p-block |
| Electron configuration | [Kr] 4d¹⁰ 5s² 5p² |
| Electronegativity (Pauling) | 1.96 |
| State at 20 °C | Solid |
| Protons / electrons | 50 / 50 |
| Neutrons (most common isotope, approx.) | 69 |
| Molar mass | 118.71 g/mol |