| Tecken | Dy |
| Atomnummer | 66 |
| Grupp | - |
| Period | 6 |
| Block | f |
| Ämnesklass | Lantanoid |
| Utseende | Silvery white |
| Färg | Silver |
| Antal protoner | 66 p+ |
| Antal neutroner | 97 n0 |
| Antal elektroner | 66 e- |
| Fas vid STP | Fast |
| Densitet | 8.54 g/cm3 |
| Relativ atommassa | 162.5 u |
| Smältpunkt | 1680 K 1406.85 °C 2564.33 °F |
| Kokpunkt | 2840 K 2566.85 °C 4652.33 °F |
| Ångbildningsvärme | 230 kJ/mol |
| Elektronegativitet (Paulingskalan) | 1.22 |
| Elektronaffinitet | 33.96 kJ/mol |
| Oxidationstal | 0, +1, +2, +3, +4 (a weakly basic oxide) |
| Jonisationspotential |
|
| Upptäckt | Lecoq de Boisbaudran (1886) |
| Första isolation | Georges Urbain (1906) |
| Namngivare | Lecoq de Boisbaudran (1886) |
Upptäckten av dysprosium In 1878, erbium ores were found to contain the oxides of holmium and thulium. French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886. His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide. He was only able to isolate dysprosium from its oxide after more than 30 attempts at his procedure. On succeeding, he named the element dysprosium from the Greek dysprositos (δυσπρόσιτος), meaning "hard to get". The element was not isolated in relatively pure form until after the development of ion exchange techniques by Frank Spedding at Iowa State University in the early 1950s. | |