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39
Y
88.906
Yttrium
Transition metals · Group 3 · Period 5
Atomic properties
| Atomic number | 39 |
|---|---|
| Symbol | Y |
| Standard atomic weight | 88.906 |
| Classification | Transition metals |
| Group | 3 |
| Period | 5 |
| Block | d-block |
| Electron configuration | [Kr] 4d1 5s2 |
| Electronegativity (Pauling) | 1.22 |
| Common oxidation states | +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 4.472 g/cm³ |
| Melting point | 1526 °C |
| Boiling point | 3336 °C |
| Discovered | 1794 |
| CAS number | — |