Details : Item 215
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alkali metals |  |  |  |  |  |  | |||||
| Alkaline earth metal |  |  |  |  |  |  | |||||
| Transition metals I |  |  |  |  |  |  | |||||
| Transition metals II |  |  |  |  |  |  | |||||
| Transition metals III |  |  |  |  |  |  | |||||
| Transition metals IV |  |  |  |  |  |  | |||||
| Post-transition metal |  |  |  |  | | | |||||
| Metalloid | | | | | | | |||||
| Diatomic non-metal | | | | | | | |||||
| Noble gas | | | | | | | |||||
| Other | | | | | | | |||||
 | |||||||||||
| Famille : Transition metals I/2 |
|---|
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| Yttrium |
| Symbol : Y, phase: solid, silvery white Named after the village where it was 1st discovered. The most important uses of yttrium are LEDs and phosphors. Exposure to yttrium compounds can cause lung disease. |
| Properties | |
|---|---|
| Atomic number | 39 |
| Atomic weight | 88.90584 |
| Melting point (K) | 1799 |
| Boiling point (K) | 3203 |
| Speed of sound (m/s) | 3300 |
| Discovery | 1794 (J Gadolin) |