50Sn118.71
Tin
Post-Transition Metal
Solid at STP
Period 5Group 14Block PDiscovered Ancient
[Kr]5s2 4d10 5p2
Tin is a chemical element with the symbol Sn (for Latin:stannum) and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows a chemical similarity to both neighboring group-14 elements, germanium and lead, and has two possible oxidation states, +2 and the slightly more stable +4.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 50 |
| Atomic Mass | 118.71 u |
| Electron Configuration | [Kr]5s2 4d10 5p2 |
| Oxidation States | +4, +2 |
| Electronegativity | 1.96 (Pauling) |
| Atomic Radius | 217 pm |
| Ionization Energy | 7.344 eV |
| Electron Affinity | 1.2 eV |
| Block | P |
Physical Properties
| Appearance | silvery-white (beta, β) or gray (alpha, α) |
| Standard State | Solid |
| Melting Point | 505.08 K (231.9 °C) |
| Boiling Point | 2875 K (2601.8 °C) |
| Density | 7.287 g/cm³ |
| Molar Heat | 27.112 J/(mol·K) |
| CPK Color | #668080 |
Classification
| Category | Post-Transition Metal |
| Group Block | Post-transition metal |
| Period | 5 |
| Group | 14 |
| Block | P |
Discovery
| Year Discovered | Ancient |
| Discovered By | unknown, before 3500 BC |
| Electron Shells | 2, 8, 18, 18, 4 |