Sulfur vs Selenium
Pick up to 3 elements and see how they stack up.
| Property | Sulfur | Selenium |
|---|---|---|
| Atomic number | 16 | 34 |
| Atomic mass | 32.06 | 78.971 |
| Electronegativity | 2.58 | 2.55 |
| Melting point | 388.36 K (115.2 °C) | 494 K (220.9 °C) |
| Boiling point | 717.8 K (444.6 °C) | 958 K (684.8 °C) |
| Density | 2.07 g/cm³ | 4.81 g/cm³ |
| Atomic radius | 180 pm | 190 pm |
| Ionization energy | 10.36 eV | 9.752 eV |
| Discovered | Ancient | 1817 |
| Category | Reactive nonmetal | Reactive nonmetal |
| State at room temp. | Solid | Solid |
| Block | p | p |
| Group | 16 | 16 |
| Period | 3 | 4 |
| Valence electrons | 6 | 6 |
| Common charges | −2 | −2 |
| Electron configuration | [Ne] 3s2 3p4 | [Ar] 3d10 4s2 4p4 |