The Periodic Table of Elements
34
Se
Selenium
78.96(3) amu
Additional Information:
| State | Group Block | Density | Atomic Radius | Electron Affinity | Ionization Energy | Melting Point | Boiling Point | Year Discovered |
|---|---|---|---|---|---|---|---|---|
| solid | nonmetal | 4.819 kg/L | 116 pm | -195 | 941 kJ/mol | 494 °K | 958 °K | 1817 |
