39Y88.906
Yttrium (Y)
Element 39 Ā· Transition metal
Yttrium (Y) is a chemical element with atomic number 39. It is classified as a transition metal in period 5, group 3 of the periodic table (the d-block). Its standard atomic weight is 88.906 u and its ground-state electron configuration is [Kr] 4dĀ¹ 5sĀ².
Yttrium facts
| Atomic number (Z) | 39 |
|---|---|
| Symbol | Y |
| Standard atomic weight | 88.906 u |
| Category | Transition metal |
| Group | 3 |
| Period | 5 |
| Block | d-block |
| Electron configuration | [Kr] 4dĀ¹ 5sĀ² |
| Electronegativity (Pauling) | 1.22 |
| State at 20 Ā°C | Solid |
| Protons / electrons | 39 / 39 |
| Neutrons (most common isotope, approx.) | 50 |
| Molar mass | 88.906 g/mol |