Sn
Tin
Tin is a chemical element with the symbol Sn and atomic number 50. It has a standard atomic weight of 118.71, sits in period 5 and group 14, and is classified as a post-transition metal.
Properties
| Symbol | Sn |
|---|---|
| Atomic number | 50 |
| Standard atomic weight | 118.71 |
| Category | Post-transition metal |
| Group | 14 |
| Period | 5 |
| Electron configuration | [Kr] 4d10 5s2 5p2 |
| Outer-shell electrons | 4 |
The figure of 118.71 is a standard atomic weight.
Calculate with tin
- Molar mass of any formula containing it
- Electron configuration, including ions
- Effective nuclear charge by Slater's rules
- Average atomic mass from isotope abundances
Group 14
Atomic weights are the IUPAC 2021 standard values, abridged to the conventional five significant figures. Group, period, category and electron configuration are derived from the atomic number rather than stored, so they cannot drift out of step with it.