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50
Sn
118.71
Tin
Post-transition metals · Group 14 · Period 5
Tin's low melting point and wetting behaviour make it the base of soft solders, where it is almost always joined to copper conductors — high-purity copper grades are detailed in the copper powder guide.
Atomic properties
| Atomic number | 50 |
|---|---|
| Symbol | Sn |
| Standard atomic weight | 118.71 |
| Classification | Post-transition metals |
| Group | 14 |
| Period | 5 |
| Block | p-block |
| Electron configuration | [Kr] 4d10 5s2 5p2 |
| Electronegativity (Pauling) | 1.96 |
| Common oxidation states | +4, +2 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 7.287 g/cm³ |
| Melting point | 231.93 °C |
| Boiling point | 2602 °C |
| Discovered | Ancient |
| CAS number | — |