The Periodic Table of Elements
69
Tm
Thulium
168.93421(2) amu
Additional Information:
| State | Group Block | Density | Atomic Radius | Electron Affinity | Ionization Energy | Melting Point | Boiling Point | Year Discovered |
|---|---|---|---|---|---|---|---|---|
| solid | lanthanoid | 9.321 kg/L | pm | -50 | 597 kJ/mol | 1818 °K | 2223 °K | 1879 |
